I preface the word AMETHYST by the adjective to emphasize how DIFFERENT these are from anything you have ever seen from the mine before. these are BETTER...glassier and gemmier...than any other Guerrero find I know of. This is one of the best Guerrero amethysts I have seen in any size. A single, large, intensely bi-colored, transparent, amethyst crystal, to 4.5 cm in length, is girdled by a cluster of smaller amethyst crystals. From Colorado dealer, Dennis Beals, who handled this small pocket several years ago. This is absolutely one magnificent specimen!