Long valued for its brilliance, zircon is a natural and affordable beauty. Learn more about the quality factors for this gem in our zircon buying guide.
Gemstone birefringence is a measure of a gem's double refraction. Learn how it’s used to identify gems and see the effects birefringent gems can display.
Everything you ever wanted to know about zircon. 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.
Did you know most gem species can be distinguished without the element of color? Learn the role gemstone colors play in gem identification.
Learn which rough gemstones are ideal for beginning faceting practice. A progression of relatively inexpensive gem species can teach important skills.
Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Box 88".