Guides to the stones on your shelf

How to identify crystals at home, and how to spot glass, dye and other fakes before you buy.

Identification5 min read

Color is the least reliable clue. Luster, crystal shape, hardness, streak and weight narrow most stones down to one or two candidates.

Real or fake4 min read

Most fake crystals are glass, resin, dyed stones or heat-treated quartz. Temperature, bubbles, hardness, color and price give most of them away.

Real or fake4 min read

Natural amethyst is rarely one even shade of purple. Color zoning, inclusions and a quick scratch test separate it from glass and dyed quartz.

All crystal guides