Dims: 1.7 x 1.0 x 1.0" (4.3 x 2.5 x 2.5 cm)
Wt: 10.1 g
Grandview Mine, Coconino County, Arizona, U.S.A.
This thumbnail specimen consists of of both massive and crystalline Cyanotrichite that is interspersed with brochantite and a pale brown host rock. The Cyanotrichite that is in crystalline form occurs as a bed of superfine needles that do not exceed 0.1" (3 mm) in length and are much thinner than a human hair. All have the classic pale blue color and dull, almost silky luster of their species. The accompanying brochantite also occurs in both massive and crystalline form- the brochantite needles are of a similar length, not exceeding 0.1" (3 mm), but are considerably thicker. They have the standard dark green color of their species and possess a rather bright pearly luster. The host rock is likely made of a shale or a finely-grained siltstone or sandstone, as it is powdery and soft.