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.
Considering buying gems in Afghanistan? Learn which Afghan gemstones to seek out, which to avoid, and prepare for a “buyer beware” experience.
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.
Many factors contribute to gemstone brightness. Learn the role a gem's refractive index plays and the difference between gemology theory and practice.
Did you know most gem species can be distinguished without the element of color? Learn the role gemstone colors play in gem identification.