Largest tanzanite gemstones in history sold for $3m 

A team of Tanzanian miners has discovered the largestĀ tanzanite stonesĀ ever seen in the country’s history.

https://edition.cnn.com/2020/06/30/africa/tanzanite-largest-gems-scli-intl/index.html?iid=ob_lockedrail_topeditorial