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Chrysocolla has a cyan (blue-green) color and is a minor ore of copper, having a hardness of 2.5 to 7.0. It is of secondary origin and forms in the oxidation zones of copper ore bodies. Associated minerals are quartz , limonite , azurite , malachite , cuprite , and other secondary copper minerals.
Slice of Eilat stone. Eilat Stone (Hebrew: אבן אילת) is a gemstone that derives its name from the city of Eilat in Israel, where it was once mined.It is characterized by a green-blue heterogeneous mixture of several secondary copper minerals, including malachite, azurite, turquoise, pseudomalachite, and chrysocolla.
Radiating spray of colorless wheatsheaf calcite crystals on matrix, from Iraí, Rio Grande do Sul, Brazil Rhombohedrons of calcite that appear almost as books of petals, piled up 3-dimensionally on the matrix, from Eastern Europe Sky blue, prismatic crystals of celestine from Majunga, Madagascar Pocket cavity of small chrysocolla stalactites ...
The statues are modelled on two real Clydesdale horses called Duke and Baron. Clydesdales were originally bred for farming and agriculture. These days, they are used as carriage and show horses.
Martin Ruland (Lexicon alchemiae) explains chrysocolla as molybdochalkos, a copper-lead alloy. In Leyden papyrus X recipe 31 chrysocolla is an alloy composed of 4 parts copper, 2 parts asem (a kind of tin-copper alloy) and 1 part gold. Argyrochrysocolla appears to designate an alloy of gold and silver. [3]
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This unusual form, which is typical of only a few minerals, means that the crystals are terminated by dissimilar faces. Hemimorphite most commonly forms crystalline crusts and layers, also massive, granular, rounded and reniform aggregates , concentrically striated, or finely needle-shaped, fibrous or stalactitic, and rarely fan-shaped clusters ...
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