Dims: 1.1 x 0.7 x 0.4" (2.8 x 1.8 x 1.0 cm)
Wt: 13.9 g w/ specimen box
Majuba Hill Mine, Pershing County, Nevada, U.S.A.
This thumbnail specimen consists of a crust of tiny Clinoclase crystals that covers two large, undefined crystals which rest on a dull, tan-colored host rock. The Clinoclase bladess are in excellent condition, showing very little human-induced damage, and have good monoclinic form, though this is very difficult to determine without at least 10-power magnification. The blades have the standard deep navy-blue coloration and a bright, pearly-to-vitreous luster, and are essentially opaque due to their color depth and intergrowth. I cannot be certain, but I believe that these crystals form a crust coating two broken smoky quartz crystals. The breakage has exposed some surfaces that have a vitreous luster and a curved, conchoidal appearance, and seem to have a pale brown color and are possibly transparent. Unfortunately, all of the natural surfaces of these crystals are completely covered by the Clinoclase, so they are very difficult to study. The specimen is hot-glued to the inside of a cubic plastic specimen box.