Getting the Best Gem Yield from a Crystal
Cutting crystals for the best gem yield is a critical skill for faceters. This walkthrough can help novices learn how to visualize the gems before…
Should I Use Oxide Polish or Diamond for Polishing Gems?
What’s the best abrasive for polishing natural gems? An oxide polish is usually the best option. Learn the different uses of oxide and diamond polishes.…
A Guide to Gem Classification
Gemologists use several different gem classification methods. Learn how the most common systems work and what they cover as well as exceptions…
What are Allochromatic and Idiochromatic Gems?
Learn the difference between allochromatic and idiochromatic gems and why some gem species can occur in many color varieties and others occur…
Crystalline Quartz Buying Guide
Although often overlooked, quartz is available in many styles at reasonable prices. Our crystalline quartz buying guide can help you pick your…
Ten Rare and Expensive Engagement Ring Stones
These ten gems are some of the rarest and most desired in the world. If money is no object, consider one of these stones for an expensive engagement…
History of Birthstones
Birthstones have become an international jewelry trend, but have you ever wondered where this tradition began? Here is your rundown on the centuries-long,…
IGS Become Member