A rare phosphate, from the TYPE LOCALITY circa late 1800s. Ex. GJ Brush collection at Yale, so obviously this was considered an important enough representative example that the Academy had to trade for it, to get the species. I cannot speak to the quality myself, never having seen one, but Brush was pretty well known for good taste...Specimen was sent to Dr. Mark Feinglos who reports the following: Clearly Yale didn't send them their best piece! There is some on there, though, although not very much, but it is a nice specimen in particular because it has a few sharp microxls of lithiophilite (rare in crystals; I only had some from Foote Mine), and some nice metaswitzerite, as well as some acicular tufts of a yellow mineral I can't identify, which isn't a form natrophilite should have