You searched for: “amethyst
amethyst
A variety of quartz, colored violet by the presence of small quantities of impurities; such as, manganese or iron; used as a semiprecious stone.

Amethysts are found chiefly in the Ural Mountains, India, the United States, Uruguay, and Brazil.

This entry is located in the following unit: Geology or Related Geological Terms + (page 2)