Azurite, Malachite
Milpillas Mine, Cuitaca, Mun. de Cananea, Sonora, Mexico
Small Cabinet, 8.9 x 8.2 x 2.5 cm
This specimen is a thick matrix of almost solid malachite with flattened, shining, densely intergrown azurite crystals growing on both sides of it. The dull areas you see are where the shallow pockets in which the crystals formed closed off.