Dims: 3.39x1.93x1.50" (8.6x4.9x3.8cm)
Wt: 4.15oz (117.4g)
Mapimi, Durango, Mexico
This is a nice specimen of adamite that shows characteristic pale green crystals against a red limonite backdrop. The crystals are individually diamond shaped (or double diamond) wedges that are often gathered into a rounded dome. The crystals are translucent and have a high luster. The smallest crystals (prismatic with a diamond cross section and variously roof or basal terminations) are transparent. The limonite is unusual, in that it is hard and does not rub off on my fingers. Indeed, there appears to be a druze of crystals along the bottom, possibly calcite, so that there is an area of sparkly red "druzy limonite".