Agate Buying Guide
Decorative, patterned forms of agate are excellent natural gems. Learn more about agate's mesmerizing patterns in our agate buying guide.
2 Minute Read
Related Articles
Chalcedony Value, Price, and Jewelry Information
Technically, chalcedony (kal SED' uh nee) is any form of microcrystalline or cryptocrystalline quartz, (meaning any form of quartz whose...
Read More
Agate Value, Price, and Jewelry Information
Agate is a variety of chalcedony that exists in many colors and is often commercially dyed. Agate is distinguished by...
Read More
What is the Average Gemstone Faceting Yield?
What’s the average gemstone faceting yield from a single piece of rough? Learn how to estimate how much material you’ll...
Read More
Unique Gem Materials for Jewelry Design
Some gems have an appeal beyond their appearance. If you’re looking for a gem with a story to tell, try...
Read More
Latest Articles
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
Chabazite Value, Price, and Jewelry Information
Although faceting chabazite isn't too difficult, it's too soft for jewelry. However, only a handful of cut chabazites may exist...
Read More
Recutting Diamonds and Colored Gemstones
When is recutting diamonds and other gems worthwhile for a professional gemologist? Learn how to make this determination and avoid...
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!