This cabochon of Shattuckite is a bright blue with beautiful patterns. Shattuckite is a relatively rare copper silicate mineral. It was first discovered in the copper mines of Bisbee, Arizona, specifically the Shattuck Mine (hence the name). It is a secondary mineral that forms from the alteration of other secondary minerals. Normally it forms pseudomorphs after malachite with little alteration of the outward shape of the original crystal structure by another crystal structure. (Pseudo-morph is Greek for "false shape").
 
Flat polished beveled back
Measures 28.70x34.70mm
Thickness 7.05mm