This is a very important American scheelite and also a very beautiful fluorescent Scheelite specimen, probably from the 1950s mining activity in the Greenhorn Mountains of California. There are numerous, translucent, white to tan colored Scheelite crystals to 2.5 cm occurring as moderately well-formed, pseudo-octahedral crystals on an altered igneous rock matrix. Under short-wave UV the Scheelite glows a vigorous white to whitish yellow! Very good material from the old Little Acorn tungsten mine! "Matrix specimens from this locality are extremely rare. Most of the time it produced single crystals and many of those were gem quality and were cut into stones. I have several in my collection that I have saved from the cutters wheel. There is one better matrix specimen in the Los Angeles County museum." Rock Currier noted in his catalog and on Mindat.org in 2014. He acquired the specimen in 1973. These are truly rare, aside from loose single small crystals, and Rock is right - few survived mining or cutting.