From a deposit long since closed, I think this is an outstanding aragonite from a classic find of the early 1970s. On a crust of massive aragonite with minor sulfur are numerous colorless, twinned, lustrous, gemmy aragonite crystals up to 2.5 cm in length. The basal pinacoids (flat faces atop) are gemmier than the prism faces which can be opaque and chalky white in places, creating a shocking contrast. These are highly fluorescent