Ex. Richard Kosnar Collection, these danburites are included by another mineral that gives them a grey-blue color, and it is quite unique. I have seen many over the years and usually dismiss them out of hand as not being display-worthy. Fine danburite specimens from Bolivia are very rare, which makes this one all the more spectacular. Imbedded in a matrix of white talc, is a doubly terminated, glassy, medium gray, danburite crystal, measuring 5.5 cm in length (2 inches!). It is terminated all around, freestanding, and complete!