Dims: 3.7 x 2.7 x 1.3" (9.4 x 6.8 x 3.2 cm)
Wt: 4.6 oz. (131 g)
Maid-of-Sunshine Mine, Arizona, U.S.A.
A matte of countless tiny, fibrous Cyanotrichite needles rests on the rusty-brown base of this cabinet specimen. These needles do not exceed 2 mm in length and are too small and fine to examine effectively even with a loupe. Almost all of them have been matted down or crushed, and a powerful microscope is needed to study their orthorhombic form. Their color is sky-blue and their luster appears to be pearly, though the entire matte has a dull, silky luster. They are likely at least translucent. They rest on a bed of what I have been told is allophane, an apparently amorphous, hydrous aluminum silicate- it does appear, however, to show some nodular, almost botryoidal form, and has a pale, dull, blue-gray color and dull luster. A small amount of brochantite also appears to be present.