The mine at Huanuni has produced some of the finest Vivianite specimens in the world. This crystal group hosts several gemmy blue-green, sharp, somewhat lustrous crystals. The largest Vivianite crystal measures 1.5 cm long. This is from a find from about 9 years ago, when there was a bonanza at Huanuni for Vivianites. Shortly after, there were no more specimens, and there truly hasn't been much since.