Malachite

Acid testing is a destructive procedure gemologists and mineralogists can use to determine if some pieces are real or fake. Learn how to perform…

Our gemstone care guide covers many popular gems. Learn how best to maintain your gemstone jewelry and what kinds of stresses and cleaning methods…

Gem carvings are judged on material, workmanship, and artistry. Learn how to apply these criteria to a piece with our step-by-step guide.

A favorite color for nature-inspired designs, green gemstones never go out of style. Learn which of these 32 green gems hold up best for engagement…

How accurate are gem, mineral, and rock scanner identification apps? Our review covers the strengths and weaknesses of over 20 apps.

Emerald crystals can grow very large. Learn about some of the world’s largest emeralds, whether rough, faceted, or carved.

Gem formation usually involves mineral crystallization and other geological processes. Learn how these affect the gemstone properties gemologists…

One of the rarest of all facetable gems, cut cuprites can show magnificent deep red color. However, these beautiful stones are too fragile for most…

Crystals have habits. In crystallography, mineral habits refer to the way crystals form within a specific mineral. There are six crystal systems.…