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
Carbonados from the Central African Republic. These samples date from 3.2 billion years ago. Photo by James St. John. Licensed under CC by 2.0.
Article: What are Black Diamonds and Carbonados?
Credit: James St. John