Science, tools, identification, treatment, valuation & grading of gems
Gemstone jewelry settings, metals, tools, cutting & faceting stones
List of all gemstones from A-Z with in-depth information for each
Thousands of gem photos searchable by various properties.
Everything you need to know about buying your perfect diamond
Learn more about these popular gemstones, their meaning & about buying birthstone jewelry
Price guidance on over 70 types of gemstones
In-depth guides to quality factors of the 40 most popular gemstones
Synthetic corundum gems, all 8 x 10 mm. Photo © Joel E. Arem, PhD, FGA. Used with permission.
Article: What is the Best Synthetic Corundum?
Credit: Joel E. Arem, PhD, FGA