Chrysocolla tumbled stones (20-30mm) from Peru

The mineral chrysocolla is a hydrated copper-aluminum-silicate with the chemical formula (Cu, Al) 2H2Si2O5 (OH) 4 · n (H2O). The mineral belongs to the cyclosilicaten.Het translucent to opaque green, blue, blue-green or brown chrysocolla has a dull luster to glass, a bright green stripe color and the mineral has no cleavage. Chrysocolla has an average density of 2.15, and the hardness is 2.5 to 3.5. The crystal system is orthorhombic and the mineral is not radioactive. Similar minerals are Dioptase, shattuckite and turquoise. The name of the mineral chrysocolla is derived from the Greek words chrysos ("gold") and kolla ("glue"). This name is given because the mineral was used for soldering gold. Chrysocolla is a fairly common mineral that occurs mostly as an accompanying mineral of copper ores. The type of location is Nizhne-Tagilsk in the Urals, Russia. Significant concentrations are available in the United States, primarily in the states of New Mexico, Nevada, Arizona, California, and Idaho. This mineral is also found in Mexico, Chile, Peru and Canada. Very beautiful stones come from Israel, South Africa, Congo, Zimbabwe, Russia, Kazakhstan, Moldova, Germany, England, Romania and France. Eilat Stone is a fusion of turquoise and chrysocolla with malachite site at Eilat in Israel. Chrysocolkwarts is an intergrowth of chrysocolla with quartz.