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
Remember to check for bulges and asymmetry in the pavilion of the ruby, too. Photo by Mauro Cateb. Licensed under CC By 2.0.
Article: Appraising Rubies
Credit: Mauro Cateb