Dims: 5.0x2.75x1.8" (12.8x7.0x4.7 cm)
Wt: 10.6 oz. (300.0 g)
Naica, Chihuahua, Mexico
This is a very pleasing specimen of Angellite (a variety/trade name of anhydrite). The translucent pale-blue crystals show a radial habit, with curved basal cleavage planes. The back (natural, uncleaved) side of the specimen shows hundreds of intergrown crystals of anhydrite covered with a druze of what I believe to be calcite crystals.