Opal Buying Guide
Our opal buying guide can help you learn how opals are graded, what to avoid, and how to identify a high-quality stone or a bargain in the rough.
8 Minute Read
Related Articles
Opal Stones and Gems: Value, Price, and Jewelry Information
Opals are in a class by themselves. As a species, opal is so unique it has its own descriptive vocabulary....
Read More
Gemstone Doublets, Triplets, and Other Assembled Stones
Made from two or more materials, assembled gems can make durable and affordable jewelry. Learn more about gemstone doublets, triplets,...
Read More
Tips for Cabbing and Carving Opals
Opal cabochons can fetch high prices but may be difficult to cut. These tips for carving opals can help gem...
Read More
An Interview with Opal Expert Joel Ragan
Opal expert Joel Ragan has worked with these gems for 45 years. Learn how he got started and his top...
Read More
Latest Articles
Peridot Value, Price, and Jewelry Information
The modern August birthstone, peridot has been prized as a jewelry stone since ancient times. Always green in color but...
Read More
Traditional Diamond Cut Grading Methods
Traditional diamond cut grading methods prepare gemologists for making evaluations with minimal time, tools, and references. This step-by-step guide covers...
Read More
Cutting a 294-ct Trilliant Morganite: An Interview with Steve Moriarty
Learn the story behind the 294-ct trilliant morganite cut by Steve Moriarty of Moriarty's Gem Art and watch his gem-cutting...
Read More
Tourmaline Engagement Ring Stones: the Ultimate Guide
Thinking about a tourmaline engagement ring? Learn everything you need to know to buy your perfect gem, from hardness and...
Read More
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
Get Gemology Insights
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!