Flint and mozarkite are types of chert. While flint is known for its practical use, mozarkite is a colorful variety of chert that can be made into jewelry.
Turkey's gemstones include well-known species such as diaspore, chalcedony, and jade, as well as unusual specimens of lesser-known gems. Learn more here.
What's the best doublet glue for creating assembled stone jewelry? Learn about the choices as well as tips for making the bond between gemstones stick.
A quartz wedge can be used with a polariscope to help a gemologist distinguish the + or – optic sign of a gem. Learn how to make and use one.
Agate stones typically form slowly in the cavities of ancient hardened lava flows. Learn where you can see this process occurring today.
Many factors contribute to gemstone brightness. Learn the role a gem's refractive index plays and the difference between gemology theory and practice.
What are the best facet designs for novice gem cutters? Find recommendations for cutting styles, books, resources, and gemstone rough here.
Did you know most gem species can be distinguished without the element of color? Learn the role gemstone colors play in gem identification.
Want to start cutting beautiful star gemstones? Here are some helpful gemological resources for novice lapidaries and jewelers.
Learn why citrine gemstones are sometimes misidentified as topaz. A professional appraisal by an independent gem lab is the best way to identify your gems.