Cabinet, 11.2 x 9.3 x 0.4 cm
Chino Mine (Santa Rita Pit; Santa Rita Mine), Santa Rita, Santa Rita District, Grant Co., New Mexico, USA

A beautiful "fan" of entirely crystallized copper, in the form of hundreds of densely-packed crystals ending in finger-like tendrils at the periphery. It is not thin, but very substantial and sturdy - in addition to being quite beautiful.