# International Gem Testing Laboratory & Research Center > Results You Can Trust ## Pages - [Privacy Policy](https://igtlrc.org/privacy-policy/): Privacy Policy International Gemstone Testing Laboratory & Research Center (IGTLRC)  will not share your information with anyone, except as necessary to complete your purchase or as required by law (such as law-enforcement agents, in the case of fraud). The purpose of the information we gather is to provide better service to you alone. Information Collected Following are the means used for collecting information, and specific information collected from visitors: Cookies A cookie is a piece of data stored on a visitor’s computer, containing information about the visit.  Information collected by cookies allows us to recognize a user on subsequent visits, […] - [Diamond 4C's](https://igtlrc.org/diamond-4c/): Diamond 4C’s Diamond Carat Carat is the term used to describe the weight of any gemstone, including diamonds. Although the definition of a carat has changed over time, since 1913 the international standard has been 200 milligrams, or 1/5 of a gram.Diamonds can range in size from a fraction of a carat to several carats. Given the rarity of large stones, however, the price increases rapidly with size; therefore, a single 2-carat diamond will cost much more than two 1-carat diamonds. Very large diamonds with good color and clarity are very rare. Below is the IDT Diamond Color Chart with definitions Color […] - [Diamond](https://igtlrc.org/diamond/): Diamond Colour and varieties Colourless (white); pale yellow, pale brown, pale green or grey. Fancy colours (those of a distinct colour) including yellow and brown; rarely green, pink, blue and black; very rarely red and purple. Commercially, diamond is the most important of all gem species. It is estimated that diamonds account for approximately 90% of the value of gemstones purchased thoughout the world. Diamond is faceted to display its unique combination of adamantine lustre and fire. This fire is a direct result of the high disperaion (0.044) of diamond. Diamond displays a higher degree of dispersion than any other […] - [Coral](https://igtlrc.org/coral/): Coral There are two main kinds of gem coral: percious coral which is typically red, pink orange or white, and black and golden coral. The Romans believed coral would prevent childhood ailments, as well as using it as a charm against sterility. It is a soft material and is commonly fashioned as cabochons, beads, earring drops, cameos and carvings. It is easily attacked by acids and contact with cosmetics should be avoided. To clean use mild soapy water. The pink coralsb> are characterized by a fine corrugation structure running along the lengths of the branches which is often visible in fashioned pieces. Black […] - [Emerald Gemstone](https://igtlrc.org/emerald-gemstone/): Emerald Gemstones The Green colour of emerald is caused by traces of chromium (Cr), although vanadium (V) may also be present in some stones. Trapiche emerald – trapiche emerald crystals from colombia are of several types and usually display a six-rayed radial structure. Commonly, they consist of a central hexagonal green crystal from which six segments of similar colours have grown outwards. A fine-grained mixture of colourless beryl and feldspar fills the radial spaces. Emerald is the birhtstone for may. In the 1914 book The Book of Talismans the author writes of emerald: “If worn in a ring, emerald strengthens the memory […] - [Opal](https://igtlrc.org/opal/): Opal Colour and Varieties Precious Opal — Opal with play-of-colour on a pale (white opal) or dark (black opal) background. Fire Opal— Transparent to translucent brwonish-yellow, to ornage, to reddish-Orange; may show a play-of-colour. Common Opal— Translucent to opaque material with a range of body colours but no play-of-colour. Opal can be divided into two varieties — precious opal and common opal. Both are fashioned as gemstones, but only precious opal shows a vivid play of iridescent colours for which this gem is prized. Fire opal is named for its colour and water opal for its appearance; both may show a play-of-colour. Some white opal dispalys a […] - [Garnet](https://igtlrc.org/garnet/): Garnet Colour and varieties Gem garnets occur in various colours including red, orange yellow and green. Rarely four-and six-rayed star stones can occur. Colour-change garnet which appears bluish-green in daylight to purplish-red in incandescent light. Gem garnets are transparent to translucent and have a bright vitreous lustre. The name ‘garnet’ refers to a group of minerals related in composition and crystal structure. As with other gemstones, quality determines whether garnets are faceted or cut as cabochons. Garnets have a mdium to high dispersion often masked by their body colours. All garnets have the sme general chemical formula X3Y2(SiO4)3. The group […] - [Pearl](https://igtlrc.org/pearl/): Pearl Colour and varieties Colour-body colours of pearl can be broadly classified as white, golden, grey, brown(Chocolate) and black. In addition, there may be various iridescent tints including pink, green, blue and lilac contributing to the overall colour of the pearl. Pearls used in jewellery fall into two categories:- Natural- produced entirely by natural categories Cultured- Artificially initiated and farmed. Pearls may be: Marine (saltwater) Freshwater Pearls are among the earliest of gem materials used for personal adornment. Created by soft-bodied animals which secrete a hard outer shell of calcium carbonate around themselves and live in fresh- and salt-water locations throughout the world, […] - [Fancy Colored Sapphires](https://igtlrc.org/fancy-colored-sapphires/): Fancy Colored Sapphires All colours of corundum excepts for red and blue are called fancy-coloured sapphires. These fancy-coloured stones should be described by colour, for example, ‘green sapphire’, ‘yellow sapphire’ and ‘purple sapphire’. The only exception to this is the rare pinkish-orange stones called padarsdscha. Common Treatments The irradiation of colourless to pale yellow sapphire produces a deep yellow to brown colour which can fade rapidly on exposure to heat or light. Treated yellow sapphire is difficult to distinguish from natural yellow sapphire. Tests Dichroscope- Strong in varieties other than yellow. Other colours will show differing shades of the body colour. […] - [Sapphire](https://igtlrc.org/sapphire/): Sapphire Corundum occurs in all colours. Sapphire is the name given to all colours of corundum other than red. When used on its own, the name implies blue sapphire. Blue Sapphire is coloured by a combination of iron and titanium. Some sapphires may exhibit a colour change. Common treatments Both heat treatment and diffusion treatment are common in sapphires. Materials with a similar appearance Blue glass, iolite, blue tourmaline, tanzanite, blue spinel, blue synthetic spinel and corundum-corundum doublet. Localities and inclusions Locality Comments and inclusions Kashmir, India Restricted production of fine-coloured blue sapphire, often with a very slight milkiness caused […] - [Cat's Eye](https://igtlrc.org/cats-eye/): Cat’s Eye This pale yellow, honey-coloured or green/brown translucent to transparent variety showing good chatoyancy was at one time called cymophane. Chatoyancy is caused by very fine parallel needles or hollow tubes. Good examples show a very sharp bright ‘eye’. To display these cat’s-eyes to best effect these stones are cut as cabochons. Localities Cat’s-eyes are found in brazil and sri Lanka. Other localities include India, Myanmar (Burma) and Zimbabwe. Materials with a similar appearance Cat’s-eye quartz; bleached tiger’s-eye quartz cut to show cat’s-eye, fiber optic glass and yellow to brown cat’s-eye opal. - [Ruby](https://igtlrc.org/ruby/): Ruby This red variety of corundum occurs as bright red, purplish or brownish- red and deep pinkish- red colors. Ruby is the birthstone for July. One sixteenth-century writer wrote of ruby that ruby “gave control of the passions, drove out evil thoughts, secured possessions to their rightful owner, reconciled quarrels, brought peace and concord and also preserved bodily strength and health.” In the past most red stones including ruby, spinel and garnet showing a good hardness and luster were often called ‘ruby’. As our knowledge of gems improved these other materials became better recognized in their own right, but misidentification […] - [Diamond Shapes](https://igtlrc.org/diamond-shapes/): Diamond Shapes Every diamond has its own story and every lady her own style. At this point it should be noted that the shape of a diamond can also be referred to as its “cut”, like a round or princess cut. However, this should not be confused with the more commonly used term of diamond cut, which describes how well the diamond has been polished from the raw material (see section on diamond cut). At IDT we cater to the detailed wishes of every customer and want to ensure that they are well-informed about every diamond shape available. Our selection […] - [Gemstones by Color](https://igtlrc.org/gemstones-by-color/): Gemstones by Color Many people purchase gems by type – for example, they want to buy a sapphire, a tourmaline or an amethyst. But one thing we’ve learned in the colored gem business is that most customers are concerned above all with color, and are less concerned with gem variety, as long as the stone they buy is durable enough for their purpose.Finding gems by color can often be difficult, since websites tend to organize their inventory around gem varieties rather than colors. So for those who want to know what their options are in particular colors, here is a […] - [Importance of Certification](https://igtlrc.org/importance-of-certification/): Importance of Diamond and Gem Certification Buying jewellery is almost a religion across the globe and has clearly emerged as an essential lifestyle product. But mostly a buyer, as an individual, is always in doubt about whether the purchase of Gem or Diamonds is genuine or not, as they are putting in their hard-earned money into an unknown territory. So, what should be a trusted solution to this worldwide concern? The solution is, that gemstones should only change hands when accompanied by a certificate attesting to its quality. Pioneer in Certification IGTLRC is the most trusted name in the field […] - [Jewellery Care Tips](https://igtlrc.org/jewellery-care-tips/): JEWELLERY CARE TIPS Do’s Always use make-up, lotions, cosmetics, perfume, hair spray, soap before wearing your jewellery. Remove any perspiration or oil gently with a soft cloth after using your jewellery, before storing. Use fabric lined boxes to store your jewellery. Wrap each piece individually in tissue or cotton to prevent scratches. Dont’s Do not wear jewellery while doing physical activities like exercise, swimming, gardening, housekeeping and other household chores. Never expose jewellery to household cleaning products. Never wear jewellery when swimming in a chemically treated swimming pool or while soaking in a spa. Cleaning your jewellery Establish a daily […] - [Prices](https://igtlrc.org/prices/): Gemstone Submission We are pleased to offer various options for submitting your goods to our laboratories around the world. Please contact your preferred location directly with the price request from below to get the relevant documents. Switzerland Submission options and prices:You may submit your stones by security courier or personal appointment to our laboratory in Meggen, Switzerland. Prior to shipping or personally submitting goods to our laboratory, confirmation with us by email is required.Please contact us with the email form below for price list, submission form and detailed shipment instructions. IMPORTANT: It is the clients responsibility to insure the goods adequately and to […] - [Report Verification](https://igtlrc.org/report-verification/): Gemstone Report Verification IGTLRC online gemstone report verification services are available to check the authenticity of a IGTLRC report. Any party can use this service free of charge. Each report issued by IGTLRC is concluded on the basis of thorough expert analysis of stone/jewellery submitted for testing, as per the scientific tests performed with Gemmological equipment and to international standards. Enter the Lab Report Number in the Order Number field below.   - [Home](https://igtlrc.org/): ALWAYS GET RIGHT RESULTS. ISO 9001:2015 Certified Testing Laboratory GEMSTONE TESTING ACCURACY 100% Steven Triont, G.M. & VP Compliance, IGTLRC, Switzerland International Gemstone Testing Laboratory & Research Center (IGTLRC) is among the premier networks of Gemological Laboratories, which empowers and enables jewellers, jewellery brands, manufacturers, wholesalers, end use customers and the masses in general to get a third party certification for its loose and studded gemstones, diamonds and jewellery. IGTRC Worldwide is the most trusted name in the field of gem identification and certification. Our brand is among the premier networks of Gemological Laboratories and symbolises trust, reliability and high-worth. […] - [Frequently Asked Questions](https://igtlrc.org/faq/): IGTLRC FAQ’s See frequently asked questions and answers to them. How can I submit stone for testing? To submit the stone, depositor has to visit IGTLRC location lab with valid government issued ID (DriversLicense, Passport, etc.). Personnel sitting at the reception will assist in the stone submission procedure. Facility of submission of stone through courier is not presently available. How can I collect my stone after testing from lab? Same person, who has deposited the stone, must visit the lab to collect the stone and its report. At the time of collection, customer has to show his ID which was […] - [Services](https://igtlrc.org/services/): Incubator Chemical Research To help stakeholders in government and business make smart decisions. Biosafety Pathology Testing To help stakeholders in government and business make smart decisions. Pathology Artificial Intelligence To help stakeholders in government and business make smart decisions. Oncology Healthcare Labs To help stakeholders in government and business make smart decisions. Incubator Diabetes Testing To help stakeholders in government and business make smart decisions. Incubator Advanced Robotics To help stakeholders in government and business make smart decisions. Biosafety Pathology Testing To help stakeholders in government and business make smart decisions. Oncology Alternative Energy To help stakeholders in government and […] - [Our Services](https://igtlrc.org/our-services/): INTERNATIONAL GEMSTONE TESTING LABORATORY & RESEARCH CENTER OUR SERVICES Each report issued by IGTLRC Offices are concluded on the basis of thorough expert analysis of stone/jewellery submitted for testing, as per the scientific tests performed with Gemmological equipment. IGTRC provides three primary and nine secondary testing services. 01 Gemstone Identification For Gemstone identification, stone can be submitted in the form of cut and polished, rough, mounted in jewellery, carving, and beads (loose or in string). This category is further divided in two categories 02 Diamond Jewellery Grading Diamond jewellery grading report is issued for diamonds mounted in jewellery (ear tops, […] - [About Us](https://igtlrc.org/about-us/): WE ARE THE TRUSTED EXPERTS Founded in 2003, IGTLRC is an internationally recognized diamond, gemstone and jewel testing facility specializing in complehensive analysis of all varieties of presious stones. IGTLRC’s testing & reporting methodology provides you with unsurpassed quality and reliability. We are committed to providing you with the highest level of service and reporting that our clients and the industry have come to expect from IGTLRC. ABOUT US TRUST & INNOVATION IGTLRS has the distinction of being the first laboratory in the USA to issue Country-of-Origin reports. IGTLRC has a long tradition of research into the detection of and […] - [Contact Us](https://igtlrc.org/contact/): Worldwide Locations IGTLRC has offices strategically located across Europe, Asia, and North America. We are pleased to get in contact with you. For price list requests and submission information please go to the designated PRICE LIST REQUEST page. IGTLRC Head Office | Switzerland IGTLRC Swisslab AG Baumschulweg 186045 Meggen email: swisslab@igtlrc.org Global Laboratory Network IGTLRC France Office IGTLRC (Paris) SAS 214 Rue Saint-HonoréParis 75001 email: parislab@igtlrc.org IGTLRC Hong Kong Office IGTLRC Lab (Hong Kong) Limited 19th Floor, Man Hing Commercial Building89 – 93 Queen’s Road CentralHong Kong SAR Opening Hours: Mo-Fr 10:00-12:30 / 14:00-16:30 email:hklab@igtlrc.org IGTLRC India Office Mumbai Office IGTLRC Mumbai Pvt. Ltd.18th Floor, Room 1809, […] ## Optional - [Agent (MCP protocol)](websites-agents.hostinger.com/igtlrc.org/mcp) [comment]: # (Generated by Hostinger Tools Plugin)