REPORT CHECK SUBMIT A GEM LIST YOUR STORE GIA STORE MY GIA Type 1 or more characters for results. GEM ENCYCLOPEDIA ANALYSIS & GRADING EDUCATION ALUMNI RESEARCH & NEWS PREVIOUS GEMOLOGY & JEWELRY DESIGN Unearth Your Career Potential with a GIA Education APPLY TODAY NEXT Pause FEATURED RESEARCH & NEWS PREVIOUS Natural-looking chrysoberyl crystals appear in a flux-grown ruby with a high beryllium content but lacking heat treatment. GEM NEWS INTERNATIONAL Natural Freshwater Pearls from Europe: Russia, Scotland, and Germany Analysis of eight European freshwater pearls of known provenance gives pearl specialists the opportunity to add greatly to GIA’s identification database. READ MORE LAB NOTES Transparent Rhodonite with Clarity Enhancement A clarity-enhanced rhodonite stuns with its exceptional size, transparency, and vivid color. READ MORE WEBINAR SERIES GIA Knowledge Sessions Engage in webinars on the most diverse and pressing issues in gemology today, including gemstone origin, laboratory-grown stones and new discoveries in field gemology. LEARN MORE NEXT LEARN & CONNECT LEARN HOW TO BUY Engagement Rings DISCOVER Diamond Origin USE OUR LABS TO Verify a Stone DOWNLOAD Gems & Gemology THIS MONTH'S FEATURED GEMS PERIDOT Found in lava, meteorites, and deep in the earth’s mantle, yellow-green peridot is the extreme gem. FANCY COLOR DIAMOND Dazzling brilliance. Captivating color. These are the planet’s most valued gems. DIAMOND Diamonds are among nature’s most precious and beautiful creations. EMERALD Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine. CITRINE Citrine is the transparent, pale yellow to brownish orange variety of quartz. VIEW THE GEM ENCYCLOPEDIA YOU MIGHT ALSO LIKE Find a Retailer LEARN MORE Shop the Campus Store LEARN MORE Subscribe to Knowledge Rocks Emails LEARN MORE Learn About Diamond Origin Reports LEARN MORE By closing this banner or using this site you agree to our revised Privacy Notice, Terms of Service and Cookie Policy. Gem Encyclopedia Education Research & News Analysis & Grading About GIA GIA Instruments Retailer Support GIA Store FAQs Pressroom GemKids Website Quality Assurance Benchmarks for Jewelry 4Cs of Diamond Quality Student Consumer Information Gem & Jewelry Careers Careers at GIA Locations Report A Concern Support GIA Contact Us Change Preferences Follow Us Change Language: English (US) Copyrights and Trademarks Privacy Notice Terms of Use Link to GIA Developer APIs Ethics and Compliance About This Site © 2002 - 2021 Gemological Institute of America Inc. GIA is a nonprofit 501(c)(3) organization. All rights reserved. Feedback Launches Comment Card In New Window