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International Annealed Copper Standard (IACS) pure =1.7×10 −8 Ω•m =58.82×10 6 Ω −1 •m −1. For main article, see: Copper in heat exchangers. The TPRC recommended values are for well annealed 99.999% pure copper with residual electrical resistivity of ρ 0 =0.000851 μΩ⋅cm. TPRC Data Series volume 1 page 81. [8]
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Goldstone Goldstone glass under magnification. Goldstone is a type of glittering glass made in a low-oxygen reducing atmosphere.The finished product can take a smooth polish and be carved into beads, figurines, or other artifacts suitable for semiprecious stone, and in fact goldstone is often mistaken for or misrepresented as a natural material.
Gothic châsse; 1185–1200; champlevé enamel over copper gilded; height: 17.7 cm (7.0 in), width: 17.4 cm (6.9 in), depth: 10.1 cm (4.0 in). Vitreous enamel, also called porcelain enamel, is a material made by fusing powdered glass to a substrate by firing, usually between 750 and 850 °C (1,380 and 1,560 °F).
In the United States they may be called "pepperoncini"; [4] they are quite distinct from Italian peperoncini, which are hot Italian chili peppers. Friggitello is mild with a slight heat and a hint of bitterness, and is sometimes pickled and sold in jars. In Italy friggitello is most associated with the region of Tuscany. The Greek variety ...
Peperoncino (Italian: [peperonˈtʃiːno]; pl.: peperoncini) is the generic Italian name for hot chili peppers, specifically some regional cultivars of the species Capsicum annuum and C. frutescens (chili pepper and Tabasco pepper, respectively). [1] The sweet pepper is called peperone (pl.: peperoni) in Italian. [2]
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.
The copper leads to variant color within some stones, where turning one stone will result in manifold hues: the more copper within the stone, the darker the complexion. [ 9 ] On August 4, 1987, the Oregon State Legislature designated Oregon Sunstone as its state gemstone by joint resolution.