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Established in 1931, GIA is an independent nonprofit that protects the gem and jewelry buying public through research, education and laboratory services.
- Report Check
Report Check - Gemological Institute Of America | All About...
- Submit A Gem
The GIA Memo Creator makes it easier than ever to submit...
- LIST YOUR STORE
Search a city or postal code to find retailers who carry...
- Learn How To Buy Engagement Rings
The center stone is surrounded by tiny gemstones in a pave...
- Gem Encyclopedia
GIA’s Gem Encyclopedia is a virtual journey through the...
- Fancy Color Diamond
Diamonds in the normal color range are colorless through...
- Birthstones
Birthstones are a fun, popular and colorful introduction to...
- Emerald
Gem experts differ on the degree of green that makes one...
- Report Check
13 de mai. de 2024 · Nanoscale Techniques for Characterizing Gemstone Coatings: A Case Study on Synthetic Moissanite. Provides a basis for analyzing colored coatings on a variety of polished gemstones. Read More
Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist! The basic building blocks of understanding the science of gemstones.
- Jewelers and Goldsmiths
- Lapidaries
- The Scientists
- Gemstone Identification
- Getting Started in Gemology
Jewelers need to understand gemology to answer their customers' questions and identify any gems brought to them. Goldsmiths (and other metalworkers) need specific knowledge about the physical characteristics of gems in order to create appropriate settings. For example, a setting that would be ideal for a diamond could damage an opal, and the amount...
Lapidaries, or gem cutters, also need special knowledge. Appropriate cutting and polishing techniques vary from gem to gem. What would work well for one gemstone would be a waste of time or even disastrous on another gem. Faceting and gemstone color management go hand in hand. How cutters orient the roughcan greatly impact the appearance of the fin...
Although scientists with degrees in geology, chemistry, and even physics make up the smallest group of gemologists, they're influential. The systematic measurement and recording of the physical and optical propertiesused to identify gemstones is a well-established but ongoing scientific process. For centuries, the lapidary was in the best position ...
Gem identification is the heart of gemology. For example, some rubies and garnets are impossible to distinguish by their appearance, but their physical properties differ considerably. Ruby and garnet crystallographyvaries greatly. While the visible shapes of individual stones may vary, the crystal structures of these gems at the atomic level are di...
If you're interested in learning about gems, first, learn how they're categorized and the terms used to describe them. Next, study their physical and optical properties. With this background, you can start learning how to identify gemstones. Of course, there are many side roads to travel as you study gemology. Perhaps you'll become fascinated with ...
Get trusted diamond and gemstone information when you need it. Information and educational services for everyone interested in gemstones. For gemologists, hobbyists, jewelers, lapidaries and everyone in between. Become a Member.
A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or polished, is used to make jewelry or other adornments.
