Reference No. : Weight : R-201812561 1506 Click to Download File

Reference No. : Weight : R-201813226 145 Click to Download File

Discover our gemstone color grading, including Pigeon blood ruby, Royal blue sapphire, Cornflower sapphire, Padparadscha sapphire, Paraiba tourmaline, Muzo green emerald and Cobalt spinel. The Art of Colour Grading Bellerophon Gemlab Group Download our dedicated color book When we establish the colour of a Gemstone or compare the colours of two gemstones side-by side, several factors must be considered: 1. Use a consistent, standard source of light with known illumination characteristics. 2. The observation should take place in an appropriate surrounding environment that is neutral in its colour appearance. 3. A defined geometry should be used between the light source, the object, and the observer. 4. If the Gemstone colour is to be compared to that of another gemstone, the latter should be a standard colour reference. 5. Observations must be made by a person with normal colour vision. Because any of these factors can influence the visual perception of a gemstone colour, they all must be controlled if accurate and consistent results are to be obtained. Colour Description of a Gemstone. Colour is a continuum that can be defined and described in terms of three attributes: 1. Hue, the attribute of colours that permits them to be classed as, for example, red, yellow, green, blue, or anything in between. 2. Tone, the relative impression of lightness to darkness of the colour. (the white and black component of the colour) 3. Saturation, the strength or purity of the colour. (the intensity of the hue) The Colour Grading light boxes The most important characteristics are: the light source, the lamp type, the measured correlated colour temperature (a term used to describe the colour of a light source, such as yellow or blue light, figure 1), its illuminance (the amount of light per unit area on a surface, multiplied by the spectral sensitivity of the eye), and a calculated colour rendering index (a measure of the degree to which the perceived colours of objects illuminated by a given light source conform to those of the same objects illuminated by a standard light source) and lastly the calculated index of metamerism (a measure of the degree to which pairs of colours with different spectral characteristics appear the same under a standard light source and different under a “test” light source). These characteristics all contribute to a person’s ability to distinguish colours while using the particular light source. Figure 1: The important influence of the light temperature use in the colour grading light boxes. Viewing Angle Geometry. A coloured gemstone has a number of colour differences, and these differences are often subtle. Therefore, both the position of the gemstone in the viewing box, and how the stone is held, are important. gemstone face up colour is evaluated most consistently when the light source is positioned directly above the gemstone, the gemstone being placed in a plastic white tray and/or held by tweezers. The distribution of the colour is evaluated in relation to stone total face up area. Main Colour. The Bellerophon Gemlab system describes a single colour as being “the main colour” of the gemstone as a whole (except in case of bi-coloured gemstone). We define this single colour as the overall colour sensation seen when the stone is viewed face-up. Obvious surface reflection and dispersion are not graded, while windowing (see through areas), and/or extinction areas are averaged with the main hue. To help determine the characteristic colour, the grader moves the gemstone slightly by rocking the tray. This process of moving the gemstone through a slight angle minimizes the effects of surface reflection, dispersion, windowing, and extinction. The “colour grade” that a coloured gemstone receives on a Bellerophon Gemlab laboratory report is a description of this characteristic colour using standardized terms. Colour Reference . Once the characteristic colour has been determined, it is categorized in colour space by means of a side-by-side comparison with two or more coloured gemstones reference. Figure 2: Main hue colour reference. Figure 3: Bellerophon Gemlab uses a total of 15 basic hue names with the corresponding approximate colours Division & Modification of Hue. There are one kind of changes that can occur to the 15 basic hues and their boundaries, as one “moves”through the Bellerophon terminology. The use of division terms as the saturation decreases. At low saturation levels, and at either light or dark tone levels, we recognize fewer hue names because there is a smaller number of discernible colours. Broader distinctions are made between stones in very dark and very light tones, and at low saturation levels. Figure 4: All hue is further divided by the combination of saturation and tone. Unfortunately for clarity and simplicity some colour defined as hue may be a different saturation and tonality of a main hue. Such as Pink being a lower saturation and lighter tone of Red, the same is true of Brown and Orange. Therefore, this figure does not hold true for all hue. There is no pastel Red and no Deep Pink… Using Instruments to Measure Colour. Certain attributes of colour appearance can also be measured with instrumentation, such as a VIS spectrometer, spectrophotometer and/or a colorimeter. The colour space of Bellerophon Gemlab colour grades are ultimately defined in CIE LAB colour coordinates. Colour measurement may provide finer colour distinctions for some materials, questions have arisen regarding the consistency of such instruments for quantifying the colour appearance of faceted gemstones (Collins, 1984). The accuracy of such measurement may greatly be influenced by the shape, size, the path length of the light and the colour homogeneity of the stone. Bellerophon Gemlab always uses instruments to measure the colour of a gemstone, but ultimately the human eyes through the grader with the help of the CIELAB colour coordinates, references gemstones and controlled environment decide the grading. As deriving a consistent set of standards for both visual observation and instrumental measurement of colour in gems is a great challenge. Cutting Factors in Colour Grading. Cutting by the decision making of the axis (for pleochroic stone), shape, proportions, facettes sizes, facettes numbers, facettes angles, and polishes affect the behavior of the light inside the gemstone, therefore cutting may play an important part of the final colour grading of a gemstone. It is not uncommon for a colour grade of a gemstone after recut to be different by several order in the grading system. Figure 5: Bellerophon Gemlab Master Hue. The simplified 2D Colour wheel display most colour grade existing in the Bellerophon Gemlab colour grading system. It is a a level 3 simplified colour system with approximately ~90 colour grades available. Dicover our colour trade name Royal blue Padparadscha Pigeon's blood

Reference No. : Weight : R-201921997 839 Click to Download File

Enter the innovative world of gemology and all the secret about your gemstone with Bellerophon Gemlab. Discover the identification, treatments and origin of your gems with our Gemmological Report. Bellerophon Gemlab menu About Discover our Team The Nomenclature of our Report Learn about our Technology The Blockchain Traceability Helping the Environment Giving Back to those in need The World Record Ruby by Bellerophon All our Services Gemstone Report Diamond Report Gemstone Testing Gemstone Privilege Gemstone Traceability Latest News Store Gemstone Identification Software Gemstone Encyclopedia Color Grading Pigeon's Blood Royal Blue Padparadscha Chameleon Sapphire Contact us Price List Verification Legal Career Term of Use Bellerophon | Gemlab Copyright © 2023 Bellerophon | Gemlab

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Discover the Gemstone Traceability Report. From rough to cut gems, we offer an integral analysis of your gemstone mining place and extraction date. Enabling a better understanding of your gemstone ethical, sustainable and human right background. Gemstone Traceability From rough to cut. Discover the history of your gemstone Rough analysis Auction Discover what's inside. Traceability Report sample. Transparency is the currency of trust. _Freda Lewis-Hall, MD Have questions about the Traceability Report? Contact us. Traceability has become an important issue in the minds of the public, policy makers, companies and consumers, in relation to the political context surrounding some geographical mining areas, as well as sustainability, ecology, social welfare and human rights. Traceability is the ability to track the movement of a gemstone backward in times and places. Our gemstone traceability reporting systems provide consumers with important additional information. As a third party, we are able to link the documentation submitted by miners, traders and any agent to the actual finished gemstone with excellent accuracy. By combining record verification and scientific analysis of the raw stones, we are now able to disclose the following: -Place of extraction -Date of extraction Ethics & Sustainability Additional information is collected and verified by us through proof of purchase at auction, import and export customs documents and miners' records. The place and date of extraction allow us to locate the stone geographically as well as the ethical context in which it was extracted. Scientific authentication in several stages ensures the absence of treatment. As the gemological data is collected several times at different stages and finally compared, we can conclude that no known or hypothetical treatment has been applied to the stone during the process. Multi-steps verification All gemological properties are collected at least twice. Firstly during the authentication of the rough stone, and finally during the analysis of the cut stone. The empirical data, the interpretations, their conclusions and the information from the collected documents are all compared. All results must match for the issuance of a traceability report. All empirical data collected during the traceability process. Dicover the blockchain certificate >

Privilege report for a magnificent and important gemstone.A complete book about your gemstone. identification, treatments detection, origin determination of colored gemstone. collector gemstone, high-value gemstone, expensive ruby, expensive sapphire, expensive emerald. 100% natural gemstone. gemstones not treated. The most complete report/certificate for an important gemstone. Privilege Delivered in 7 days* Award only delivered on gemologist discretion. See requirements. Extremely rare distinction. 36 pages book on your gemstone only. Gemmological Report Privilege The highest distinction a magnificent gemstone can receive. Technical specs. 35 x 25 x 3.3 cm. White velvet with gold foil box. Hardcover handmade book. Discover what's inside. Privilege sample. Have questions about the Privilege? Contact us. What's in the Privilege? In complement to the examination results, the Privilege gemmological report includes a detailed explanation of your gemstone species, crystallography, history and legend associated with it, the geological genetic considerations, an explanation of the country of origin, colour description, analytical properties, the internal features present and an analysis of the cutting. Privilege requirements. Be a collector item. Have a minimum monetary value. No indications of any treatment. A rare combination of size, clarity, and colour.

Bellerophon gemlab gemstone laboratories, technology, reference collection, research center, and team. Including Martial Curti, Dr Dietmar Schwarz and Theodore Rozet. Researcher in gemology and gemologists in Paris, France, and in Bangkok, Thailand. Gemstone report in Europe and Asia. ABOUT BELLEROPHON TECHNOLOGY More about Bellerophon technology > Our laboratories are equipped with state of the art gemmological equipment such as: Raman spectroscopy and Microspectrometry; Photo-luminescence spectroscopy; Infrared spectroscopy; Ultraviolet-visible spectroscopy; Energy Dispersive X-ray fluorescence; laser induced breakdown spectroscopy; Laser Ablation Inductively Coupled Plasma Mass Spectrometry; Infrared imaging; UV imaging, Excitation-Emission Matrix spectroscopy & Keyence microscope (up to 5000 magnification) REFERENCE COLLECTION Comparative analysis on one of the most complete data base in gemmology. A reference collection of more than 9000 samples including most gemstones, all known synthetic made, all enhancement ever detected and more than 4000 gem-quality samples for origin determination for Spinel, Chrysoberyl, Opal, Emerald; Ruby & Sapphire. More than than 30 countries of origin referenced. RESEARCH CENTER Fully equipped research facility to always be ahead. Our research center is equipped with state of the art heating furnaces and cutting facility, used for research and development for authentication of enhancement and research on origin determination only. BELLEROPHON TEAM Founder & Managing Director of Bellerophon Gemlab Group M.P.H Curti M.P.H Curti, Graduate Gemologist is the founder of Bellerophon Group since august 2018. Started his career as a gemstone cutter in Burma (Myanmar). Worked in Mozambique with Gemfields. Later traveling to many gem deposit and gem centers in Asia, Africa, Europe and America. Assisted with the discovery of a new mineral, worked with GRS, Thailand, and featured in a GIA article about the discovery of a new gem deposit. T.Rozet Managing Partner of Bellerophon Gemlab Group T.Rozet, Advanced Training Course from SSEF and Graduate Gemologist from Gem-A (GA) is the Bangkok Managing Partner of Bellerophon Gemlab BOI. Successfully finished the intense gemmological program with a detailed approach to identifying treatment and origin of ruby, sapphire, and emerald. Dr.G.Musilli Director of Bellerophon Gemlab Paris Giada Musilli is a doctor in Earth Science, with specialization in Crystallography, Petrography and Mineralogy from the University of Milan coupled with a bachelor in Geoscience from the University of Turin. Her thesis on Ethiopian Emerald received the best year thesis award "Ernesto Fea". She is currently the chief gemologist and director of the Paris team. V.Fejoz Director of Bellerophon Gemlab Bangkok Valentin Fejoz, Gemologist specialized in spectrometry and inclusions in gemstones, and a graduate gemologist from Gem-A (GA), is dedicated to providing precise analyses of gemstones. He has completed extensive training in gemology, with a focus on understanding the internal characteristics and origins of various gemstones through advanced techniques. A.Arsac Director of Bellerophon Gemlab Colombo Holding a diploma from the Institut National de Gemmologie (ING) and certification from the Federation of European Education in Gemmology (FEEG), he specializes in operating advanced instruments such as EDXRF and Raman spectroscopes. A.B.L. Arsac ensures precise data collection for gemmologists and drives gemological research, upholding the highest standards in gem analysis at our Colombo laboratory. F.Molle Chef Program Developer F. Molle leads our technological innovation as Chief Program Developer at Bellerophon Gemlab Paris. With a robust background as a developer at TF1 (French National TV), he specializes in software integration and machine optimization, leveraging advanced deep learning techniques to enhance our gemological analysis processes. His expertise ensures our lab remains at the forefront of precision and efficiency. P.Hinnemann Laboratory Manager Bellerophon Gemlab Paris Piotr Hinnemann is a dedicated gemologist and the manager of our french team. Graduated expert gemologist from the french Institut National de Gemmologie (ING), in Paris. He specialized with chemical data and FTIR for gemstone, as well as help with many research. His organizational and communication skills ensures seamless coordination of gemological processes in Paris. N.Puangjumpa Laboratory Manager Bellerophon Gemlab Bangkok Nopparat Puangjumpa overseeing operations with a focus on efficiency and excellence. A graduate of Mahasarakham University with a degree in Business and a specialization in English, she brings strong organizational and communication skills to our team. Her leadership ensures seamless coordination of gemological processes, supporting our commitment to delivering precise and reliable gem analysis in Bangkok. D.Mc Shane Laboratory Manager Bellerophon Gemlab Colombo Delicia Mc Shane leads operations with precision and dedication. A graduate of the Frills Hotel School in Colombo, she brings exceptional organizational and management skills to our team. Her leadership ensures the smooth execution of gemological processes, upholding our commitment to delivering accurate and reliable gem analysis in Colombo. W.Oei Gemologist Wishly Oei is a skilled Gemologist at Bellerophon Gemlab, bringing precision and expertise to our team. A graduate of the Asian Institute of Gemological Sciences (AIGS), he specializes in data interpretation and microscopy. Wishly’s meticulous analysis of gemstone characteristics through advanced microscopic techniques and his ability to interpret complex data ensure accurate identification. T.Ryon-Dutto Gemologist Tom is a dedicated Gemologist at Bellerophon Gemlab, bringing specialized expertise to our analytical team. A graduate of the Institut National de Gemmologie (ING) and certified by the Federation of European Education in Gemmology (FEEG), he excels in mass analysis for small gemstones. A. Sawatsri Chemistry analyst A. Sawatasri is a dedicated member of our team with a specialty in analytical operation. He operates instruments such as EDXRF and Raman spectroscope. He provides gemmologists with the required data collection. A.Poomkokrak Graphic designer A.Poomkokrak is a dedicated member of our team, a graduate in computer graphics from Thanaburi College she handles most graphic design projects. S.Tapprasert Spectroscopy Analytist S.Tapprasert is a dedicated member of our team with a specialty in analytical operation. She operates instruments such as 3D scan, FTIR, and Raman spectroscope. She provides gemmologists with the required data collection. A. Pachuen Customer Service Aranya Pachuen is our dedicated Customer Service representative at Bellerophon Gemlab, ensuring exceptional client experiences. With her warm and professional approach, she efficiently handles inquiries and supports our clients, contributing to our commitment to outstanding service and satisfaction. W. Petcharat Technician Analyst Woramamon Phetcharat is a talented Graphic Designer and Spectroscopist at Bellerophon Gemlab. She combines her creative expertise in designing compelling visuals with her technical proficiency in spectroscopy, contributing to both our analytical processes and the professional presentation of our brand. S.Kaewwises Technician Analyst Suprakorn Kaewwises is a skilled Graphic Designer and Spectroscopist at Bellerophon Gemlab. She blends her artistic talent for creating engaging visual content with her expertise in spectroscopic analysis, enhancing our gemological research and elevating the professional image of our laboratory. W. Khamseeho Customer Service & Administration Wilayphon Khamseeho is our dedicated Customer Service and Administration specialist at Bellerophon Gemlab. With her friendly and efficient approach, she manages client interactions and administrative tasks seamlessly, ensuring a smooth experience for our clients and supporting our commitment to exceptional service. P. Khambai Analyst Technician Patcharanan Khambai is a skilled Analyst Technician at Bellerophon Gemlab, contributing her expertise to our analytical operations. With a keen eye for detail, she conducts precise gemological analyses using advanced techniques, ensuring accurate data collection and supporting our commitment to excellence in gem identification and evaluation. W. Kuadkaisong Graphic Designer Wiramon Kuadkaisong is a talented Graphic Designer at Bellerophon Gemlab, bringing creativity and precision to our team. She crafts visually striking designs that enhance our brand’s professional image, contributing to the clear and compelling presentation of our gemological work. Dr. C. Curti, PHD & PharmD Research Associate Christophe Curti is an University Researcher on Synthetic Organic Chemistry, affiliated with AP-HM, SCQIP, as well as the CNRS ICR UMR. He provide us with reliable insight on all organic and non-organic chemistry as well as data interpretation. C.Curti, Marine Biologist Research Associate Cecile Curti is a marine biologist and geomatic specialist, with a master 2 at the University of Marseille and at the laboratory LIENSs from la Rochelle as well as chief of project for "i-Sea". She provides invaluable data and research regarding Corals, Pearls and organics ornaments. Ferdin Joe J.J, PHD Research Associate F.J.J Joseph, PHD is a lecturer in the Thai-Nichi institute of Technology, specialized in data science, with a P.H.D in computer Science and Information systems. He provides us with reliable system for data processing and comparative analysis. Visit Bellerophon Colour Grading >

Located in the heart of the famous Place Vendôme, discover our French gemological laboratory in Paris, providing a gemological report and certificate to guarantee the authenticity of your precious stones. Gemmological laboratory in Paris, France. The Only International French Gemological Laboratory. Our gemological laboratory is located in the heart of the French high jewellery district, Place Vendôme, the main square of the 1st arrondissement of Paris, France. It is the starting point of the rue de la Paix towards the Opera de Paris. Its regular architecture, due to Jules Hardouin-Mansart, and its sloping pediments at the corners give the rectangular Place Vendôme the appearance of an octagon. Place Vendôme is famous for its fashionable luxury hotels, such as the Ritz. Many famous fashion designers and jewellers have set up their salons here. As the only French gemological laboratory located in Place Vendôme, we are perfectly situated to serve our clients throughout Europe. Our French gemmological laboratory offers gem identification, treatment detection and origin determination through our gemstone reports and certificates on a wide range of gem varieties, such as ruby, sapphire, emerald and diamond. Get access to the latest news in scientific research about gemstones here. Discover our team of French gemologists, our equipment and reference samples here , as well as the different services we offer in our French gemological laboratory here . Cement mask on the wall of 16 Place Vendôme. To register an account with us, download the Account form below and create an account with us for the first time only. Fill out the form and forward us a pdf version. Download Account form English. Download Account form French. You can drop off your item in person or by courier to our French gemological laboratory in Paris at the address below. Do not hesitate to call us for any assistance. Bellerophon Gemlab 16 Place Vendome escalier B, 2eme etage. 75001 Paris France.

All the technology and analytical tools used by bellerophon Gemlab for the testing and gemstone report. It includes how we collect data on ruby, emerald, sapphire, and many more, data such as FTIR, Raman, EDXRF, and photoluminesence. NEWS & ARTICLES Analytical tools. Technology Analytical tools used at Bellerophon | Gemlab Microscope Backbones of gemmology, the microscope enables gemologists to make an diagnostic regarding the genesis, absence, or indications of treatments, and origin determinations, by studying the inclusions under high magnification. -Genesis -Treatment detection -Origin determination Digital Microscope The digital microscope enables gemologist to study a gemstone from anywhere in the world, and magnification power is greatly increased from a regular microscope, our Keyences VHX6000 enable us to observe inside a gemstone at 5,000x magnification. Refractometer The refractometer measures the extent of light refraction, as light passes through the gemstone from the air it will slow down and create refraction, the severity of the refraction will depend on the mineral composition, very useful information for identification. -Identification Specific gravity Specific Gravity (SG) is the ratio of the weight of a substance to the weight of an equal volume of water. It measures the density of a mineral, based on the earth's gravity, which depends on the chemical composition and crystal structure of a gemstone, very valuable information for identification. -Identification Polariscope The polariscope enables us to distinguish between isotropic and anisotropic transparent minerals. -Identification Fourier Transform Infrared Spectroscopy The FTIR spectrometer simultaneously collects high-resolution spectral data over a wide spectral range. Bellerophon uses it to obtain an infrared spectrum of absorption of a gemstone, Extremely important information for identification, treatments detection, and genesis. -Identification -Genesis of emerald for exemple -Treatment detection such as low heat in corundum -Origin determination Raman Spectroscopy & Micro Spectrometry Raman spectroscopy provides a structural fingerprint by which molecules can be identified. Raman spectroscopy relies upon the inelastic scattering of photons, knowns as Raman scattering. A source of monochromatic light, laser of 532nm, or 785nm interacts with molecular vibrations, phonons, or other excitations in the system, resulting in the energy of the laser photons being shifted up or down. The shift in energy gives information about the vibrational modes in the system. -Identification -Genesis of Quartz for exemple -Treatment detection such as oil and resin -Origin determination Photoluminescence Spectroscopy Photoluminescence spectroscopy, abbreviated as PL and the laser used such as PL313, PL532 is light emission from a gemstone after the absorption of photons. it is one of many forms of luminescence and is initiated by photoexcitation (photons that excite electrons to a higher energy level in an atom). -Identification -Genesis of Spinel for example -Treatment detection Energy-dispersive X-ray fluorescence In EDXRF spectroscopy, all of the elements in the gemstone are excited simultaneously, and an energy dispersive detector in combination with a multi-channel analyzer is used to simultaneously collect the fluorescence radiation emitted from the sample and then separate the different energies of the characteristic radiation from each of the different elements. it enables gemologists to know and quantify (semi-quantitatively) all elements present in samples from Sodium (Na) to Uranium (U). -Genesis of corundum for example -Treatment detection such as lead glass -Origin determination Laser-Induced Breakdown Spectroscopy Laser-induced breakdown spectroscopy (LIBS) is atomic emission spectroscopy that uses a high-energy laser pulse as the excitation source. The laser is focused to form a plasma, which atomizes and excites a small part of the gemstone. Laser-induced breakdown spectroscopy (LIBS) is considered as a quasi non destructive testing due to the fact that the laser ablate a microscopic part of your gemstone, creating an approx ~0.20 mm hole. -Treatment detection for Beryllium diffusion in corundum -Origin determination of emerald Ultraviolet-visible near-infrared spectroscopy UV-vis refers to the absorption in part of the ultraviolet and the full visible regions of the electromagnetic spectrum. It uses light in the visible range. The absorption in the visible range directly affects the perceived colour of the elements involved (chromophores). -Origin determination Ultraviolet and Visible Spectrophotometry and Imaging Spectrophotometry is a branch of electromagnetic spectroscopy concerned with the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength. The absorption of light is due to the interaction of light with the electronic and vibrational modes of molecules. Each type of molecule has an individual set of energy levels associated with the makeup of its chemical bonds and nuclei and thus will absorb light of specific wavelengths, or energies, resulting in unique spectral properties. This is based upon its specific and distinct makeup. -Origin determination -Genesis -Colour Grading -Treatments Visit Bellerophon Colour Grading >

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