At first glance, this looks like a Mexican adamite from Ojuela mine but it is NOT: rather, it is one of the best adamites from the old Gold Hill mine in Utah, so good that it looks Mexican whereas most others look like smudges and coatings on rock. This is an exceptional example for an adamite specimen from anywhere but Ojuela, and among the best adamites I can imagine from the USA. At 2.7 cm across, it is a significant size. From an old collection dispersed by Cal Graeber, with label. This is a significant USA miniature specimen for the species.