Mechanical gemstone cleaning has benefits and risks. Learn all about ultrasonic, steam, and boiling systems and how gems might react to them.
Diamonds are popular gemstones surrounded by popular misconceptions. We'll tell you how they became so prized and debunk some of those diamond myths, too.
Colorado has a lot to offer gemologists and rock hunters. Before you visit, learn about Colorado gemstones as well as notable gem shows, museums, and clubs.
How can you evaluate diamond symmetry without an expensive proportion scope? Learn how to build an inexpensive alternative tool that will get the job done.
First-time gem buyers may find diamond grades confusing. Our consumer guide explains how diamonds are evaluated and gives advice on how to choose a diamond.
Do you want to buy a diamond for an engagement ring? Don't. Still want to buy a diamond? OK. Here are the top three reasons not to buy a diamond online.
Gemstone luster describes how a gem's surface looks when it reflects light. Learn the common terms gemologists use for this property and what can affect it.
The FTC requires jewelers to accurately represent the diamond quality grading systems they use. Learn the guidelines and protect yourself from liability.
Diamond simulants, materials that look like real diamonds, often appear in jewelry. See how the properties of real diamonds compare with popular imitations.
Distinguishing a diamond look-alike from the real thing can be challenging. Learn how to use specific gravity and birefringence to make simple separations.