Classic pyramidal form for the species, with good luster and glassy modified corners. However, the SIZE of the crystal is ridiculously large and is the biggest I have seen for sale. It is a superb, museum-quality specimen of a rare and unusual mineral so rare that most people have never seen one. These are found as floaters in weird formations down here in Texas in Louisiana (just two localities, so far as I know). As a bonus, this large crystal is fairly gemmy, too, when backlit!