Tanzanite: Unique Zoisite Colors by GIA

Tanzanite: Unique Zoisite Colors by GIA. What color is tanzanite? Typically, tanzanite, the December birthstone, is found in brown, blue, and violet colors. However, in recent years, a transparent, gem-quality green zoisite has been discovered in the Merelani Hills of mineral-rich Tanzania. The gemological properties are identical to those known for blue-violet or green tanzanite. In this video, Menahem Sevdermish discusses the many different tanzanite colors and hues and p