Dims: 2.0" x 1.5" x 0.7"(5.1 x 3.8 x 4.3cm)
Wt: 1.16 oz.( 33.0g)
Km3 Adit, Agios Constantinos, Laurion, Greece
A portion of this specimen's surface is covered with tiny clusters of Annabergite, a hydrated nickel arsenate mineral. Sometimes called "nickel bloom," this mineral occurs in lovely radiating clusters of tiny grass-green crystals. They have a pearly luster that sparkles more than gleams because of their small size- a 10-power loupe is needed to see individual crystals. They have an acicular, radiating habit and are definitely translucent, but are too small to effectively test for transparence. The host rock that these clusters rest on is a dark gray color with substantial rust-staining on it. I have not seen a specimen of Annabergite before, and am impressed with the brightness of its green coloration.