Dims: 3.0 x 1.9 x 1.1" (7.6 x 4.8 x 2.8 cm)
Wt: 2.03 oz. (57.6 g)
Grandview Mine, Coconino County, Arizona, U.S.A.
This piece consists of a layer of fibrous Cyanotrichite that is sandwiched in between a pale brown, chalky host rock and a layer of either malachite or brochantite. The Cyanotrichite needles appear to be in generally good condition, though a few of the more exposed areas are crushed. The fine needles do not exceed 0.2" (5 mm) in length, and are thinner than human hairs, so their actual crystal form cannot be studied without high magnification. All have a pale blue color and likely a pearly luster, and are at least translucent on an individual basis. The brochantite or malachite mineral that coats the Cyanotrichite has a pale green color and is generally dull and massive, though several sprays of tiny, fibrous and radiating needles are visible. They are darker in color than the massive material and show a pearly luster.