Huanggang Mine, Hexigten Banner (Keshiketeng Co.), Ulanhad League (Chifeng Prefecture), Inner Mongolia Autonomous Region, China
An impressive specimen hosting a large cluster of sharp brown genthelvite tetrahedrons. The bulk of these clusters topped off around 3 cm, this one has considerably more size, and has more presence than the dimensions suggest.
Genthelvites were one of the big surprises to come from Huanggang, first appearing around 2012-2013. Prior to this find, the species was mainly known as tiny crystals from Mont Sant Hilaire, with the od example from a couple locations in Pakistan occasionally showing up. The size and quality of these however, was unprecedented.
This piece is not 100% perfect-- there are some chips. You can see them if you look in the pictures, though it displays exactly as shown, and for the price, is quite a good deal. I remember one Chinese dealer had similar pieces priced from about $10,000-$15,000 at Tucson 2014. Prices fluctuate, but this quality has not continued to come out-- in fact it comes from the same area/ pocket as the more expensive ones I saw with the other dealer.