Our lapis lazuli buying guide can help you learn how to grade these gems, what to avoid, and how to identify a high quality stone or a bargain in the rough.
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.
Acid testing is a destructive procedure gemologists can use to determine if some pieces are real or fake. Learn how to perform the test safely here.
Streak testing is a destructive gemstone test rarely used by gemologists. Most gems leave no streak. Learn which gems do and what color they leave.
Everything you ever wanted to know about lapis lazuli. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.
In Exodus, the breastplate of Aaron was said to hold 12 gems. However, the gemological identities of the stones, like jacinth and sapphire, are debatable.
Many varieties of gems besides diamond can be created in the laboratory. Our synthetic gemstone guide covers many examples and explains their manufacture.
How do you say “love me” with a stone? Learn about lapis lazuli symbolism and legends. This beautiful blue mineral has fascinated people for millennia.