Spinel

Distinguishing diamonds from their lookalikes requires educated eyes. Learn what visual features to look for and the properties of many popular…

A gem refractometer is the best tool for refractive index testing. Learn how to use this instrument to conduct this and other gem identification…

Commentaries on the foundation stones of the Book of Revelation influenced the development of the Western birthstone system. Learn more about…

Gemstone inclusions are materials trapped inside gems as they form. Learn how gemologists use inclusions to help identify gemstones and their…

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

Looking for alternatives to a classic diamond engagement ring? Learn about your options and see some wonderful photos of colored gemstone engagement…

Garnet symbolism is rich and varied. The January birthstone has inspired many legends and popular associations with love, friendship, light,…

A popular variety of colored quartz, rose quartz makes a durable jewelry stone. Although commonly cabbed and carved, more transparent material…

Don’t underestimate the importance of clarity, one of the Four Cs of gemstone grading. For faceted gems, basic clarity grading involves evaluating…