Purple Sugilite from the Kalahari Desert in S. Africa. These purple sugilite "donut" earrings are rich in color. The copper bale adds an unexpected contrast. Sugilite gets its rich color from manganese. The most highly valued are intensely purple. According to Gem Select, "In 1980 Sugilite was declared a rare gem."
I was able to purchase these sugilite donuts at the Colbaugh Processing Plant in Kingman, AZ that mines Kingman Turquoise. It was a lucky day for me!