Gemstone heat treatments can increase the beauty and value of many rough pieces. Learn how to conduct the most common procedures safely.
Learning how to conduct a gemstone examination takes practice. Follow an expert gemologist step-by-step through tests of five unknown samples.
There's more to aquamarine color than blue. Most natural stones start blue-green and are heated to blue. Learn the pros and cons of this treatment.
Carats are the units used to measure gem weight and one of the main factors in gem grading. Learn what affects the value per carat of various gem species.
Considering buying gems in Afghanistan? Learn which Afghan gemstones to seek out, which to avoid, and prepare for a “buyer beware” experience.
What's the best doublet glue for creating assembled stone jewelry? Learn about the choices as well as tips for making the bond between gemstones stick.
Oil treatment is a standard industry practice for enhancing emeralds. However, the treatments are not permanent. Learn how to re-oil emeralds safely.
What's the difference between a lab-created emerald and a natural emerald? Is a synthetic gem a real gem? Learn the facts before you buy emerald jewelry.
Aquamarine is the blue to blue-green variety of beryl. If you encounter so-called white aquamarines, buyer beware. Learn the facts about these gems here.
What factors determine the light return of faceted gemstones? Facet quality, polish, color, and cut style all play roles. Learn more about these variables.