Dims: 1.3 x 0.8 x 0.5" (3.3 x 2.0 x 1.3 cm)
Wt: 15.5 g
Uruchaqua Mine, Ancash Department, Peru
A slice of two partially intersecting Rhodochrosite stalactites makes up this thumbnail specimen. It is in moderately good condition, as only one side of the piece has been ground flat and polished- the other side is rough and quite uneven, showing a pearly luster. Both sides enable the viewer to see the concentric banding of pale and deep pink coloration that represents respective layers of more massive and more crystalline Rhodochrosite. Immediately surrounding the manganese carbonate mineral is a very thin layer of a metal or a mineral that, when viewed on the polished face of the piece, has a moderately dark silvery-gray color and a metallic luster- I do not know what this material is. This metallic layer is in turn coated with the outer "skin" of the stalactite, which is relatively smooth, though uneven, and has a matte luster. This outer layer has a dull pinkish-gray coloration, though some areas are dusted with what appears to be a dark gray, possibly metallic powder.