Buying Gem Parcels and Quality Rough
To make money, novice faceters have to buy gem parcels as well as hand-picked quality rough. Learn how a combination of both approaches can lead…
Optical Properties of Gemstones
We tend to take light for granted. It’s such a common thing we experience every day. Rarely do we think of the scientific definition of light…
Optical Dish Carving
Optical dishes are concave facets used in fantasy-cut gems. Learn this optical dish carving technique for creating your own unique gemstone designs.…
Rutilated Quartz Buying Guide
Silky golden rutile inclusions in quartz have become quite popular. Read our rutilated quartz buying guide to help you choose a stone for your next…
Basic Jewelry and Gem Appraisal Terms: What is Value?
Many people assume that a gem appraisal sets a definitive price for an item. Actually, the price depends on the type of appraisal done and can consist…
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…
IGS Become Member