This is an absolute classic, of pretty high rarity on the market! These little purple fluorites used to be (before Dalnegorsk) synonymous with the rare tetrahexahedral habit of fluorite and were much studied. This is an attractive matrix specimen with excellent pedigree and original labels dating it to the early 1900s. Jack purchased it about 5 years ago from Gene Schlepp for $475 and I traded at the same and left it under $500.