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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.
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]
Chrysocolla (Cu,Al) 2 H 2 Si 2 O 5 (OH) 4 ·n(H 2 O) 37.9 Tennantite: Cu 12 As 4 S 13: 51.6 Dioptase: CuSiO 2 (OH) 2: 45.3 Enargite: Cu 3 AsS 4: 48.4 References ...
Malachite-Quartz-Chrysocolla specimen from the Bagdad Mine. In 1882, prospectors W.J. Pace and J.M. Murphy staked a claim for gold, silver, and lead along Copper Creek. In 1883, John Lawler of Prescott, Arizona paid Pace and Murphy $200 for their claims, but were unable to make a success of it. In 1907, the Giroux Syndicate purchased an option ...
Copper has been mined on and off at Whim Creek over a period of 120 years. Copper was mined initially via a series of small adits and stopes into the Whim Creek and Mons Cupri deposits by artisanal miners, [1] with records indicating that as early as 1882 small quantities of malachite, azurite, chrysocolla and
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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.
Calibrated stones—that is, stones adhering to standard jewellery setting measurements—may also be more sought after. Like coral and other opaque gems, turquoise is commonly sold at a price according to its physical size in millimetres rather than weight. Turquoise is treated in many different ways, some more permanent and radical than others.