lapis lazuli

Gemologists can use dye testing to determine if a gemstone has been dyed to alter its color. Learn how to perform this procedure safely here.

Garnet symbolism is rich and varied. Cultures all over the world have prized this gemstone for its beautiful colors and durability. The traditional…

Gemstone coatings have been popular for thousands of years. In the modern era, the most robust coatings are applied by chemical vapor deposition…

Gemstone coatings are a simple way to enhance color and luster. Learn about commonly coated gems, different coating techniques, and how to detect…

There are so many common gemstone treatments available today that keeping track of them can be difficult. This list and handy cheat sheet can help.…

Emeralds have captivated humanity for millennia with their lush green color and profound symbolic meanings. “The Jewel of Kings” also serves…

Emeralds are notorious for growing extremely large. These examples are some of the world’s largest emeralds! If you know of something missing…

Few gems have held our attention over millennia as well as sapphire. The pure blue colors and excellent durability of this gem-quality member of…

Although gemstone magnetism isn’t commonly tested, it can help gemologists distinguish similar looking gems. Learn how to analyze this property.…