• LOGIN
  • MEMBERSHIP
  • Community
  • About
  • Advertise
  • Contact
  • Learning Center
    • Gemology
    • Jewelry and Lapidary
    • Gemstone Encyclopedia
  • Courses
    • IGS MembershipFor Professionals and Enthusiasts
    • Mini Courses
    • Professional Gemologist Certification
    • Diamond Specialist Certification
  • Prices & Buying Guides
    • Gem Price Guide
    • Gem Buying Guides
  • Gem-Related Businesses
    • View All Businesses
    • Appraisals
    • Auctions
    • Gem Cutting
    • Gem Treating
    • Gemological Laboratories
    • Gemology Supplies and Equipment
    • Gemstones
    • Informational Resources
    • Jewelry
    • Lapidary Supplies and Equipment
    • Rough Gems and Mineral Specimens
    • Special Services

Activity

separator

Take your love of gemstones

TO A NEW LEVEL

Join the thousands of fellow gem lovers who are already members

Become a Member
Articles

Recently Added or Updated

Paraíba Tourmaline Value, Price, and Jewelry Information

Discovered in 1989, paraíba tourmalines are among the world’s most prized gemstones. These rare gems are renowned for showing intense blue…

Emerald Myth Busters: Identifying Colombian Stones

Colombian emeralds can command premium prices. Jeffery Bergman separates emerald myth from fact when it comes to determining the origins of these…

How to Choose a Gemstone Shape for Cutting

How do lapidaries decide what gemstone shape to cut? Learn how inclusions, rough, orientation, and other factors can influence that decision.…
Chrome Tourmaline Buying Guide

Rare chrome tourmaline can show an emerald-like green color. With a highly desired color and tourmaline’s excellent qualities as a jewelry stone,…

Some Advice for Cutting Tourmaline Gemstones

Cutting tourmaline can be difficult. Some gems seem to shatter easily. Learn faceting techniques to minimize this risk as well as what equipment…

Understanding Gem Synthetics, Treatments, and Imitations, Part 5: Gemstone Treatments

Identifying gemstone treatments is difficult even for experienced gemologists. Learn about the many different ways gem color and clarity are…

Forum

Latest Topics

Appraiser in Durham/Newcastle/Sunderland/Hartlepool
 21 hours ago
Can anyone help me identify this? Found in Alaska in the norton sound region!
 1 day ago
Do you/would you sell fake diamonds?
 2 days ago
Talk about Rare Gemstones
 6 days ago
The nicest Tri Colour Tourmaline I have ever owned
 1 week ago
Discussion
 1 week ago
Practical exam
 2 weeks ago
Flux-healing of Rubies
 2 weeks ago
Spiny lister cabochons
 2 weeks ago
Help Identify
 2 weeks ago
Black Diamonds & Carbonados?
 2 weeks ago
Gemfields report: The future is bright for coloured gemstones in China
 2 weeks ago
separator

Subscribe to the Free IGS

NEWSLETTER

Join our weekly newsletter & get a free copy of the Gem ID Checklist!

About

The International Gem Society (IGS) is the world's top resource for gem professionals, enthusiasts, and industry content. Learn more

Contact
  • Contact Us
  • Member Support
  • FAQ & Help
Want more gemology insights?

Learn how to get started with the International Gem Society’s guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!

SIGN ME UP

© 2020 International Gem Society LLC. All rights reserved.   Privacy Policy   |   Terms of Use   |   Affiliate Disclosure

Ready to learn how to identify gems on your own?

Join our mailing list below to download a FREE gem ID checklist tutorial. See what’s inside…

  • Discover the 17 practical steps to gemstone identification (even if you’re just getting started with gemology)
  • Learn how you can use specific tools to gather data, make observations & arrive at an accurate ID
  • Explore a range of gemological tests… not only will you get familiar with the process but also time-saving shortcuts!

IGS Become Member

Join IGS today for great benefits!

  • Exclusive access to our premium articles and courses
  • Unlimited access to our gem pricing guide
  • Create your own listing in our business directory
  • Professional certification courses
  • Mini gemology courses
  • Participate in our member-only forums

Membership options