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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.
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]
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]
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 ...
There is evidence that gold and meteoric iron (but not iron smelting) were the only metals used by humans before copper. [3] The history of copper metallurgy is thought to have followed the following sequence: 1) cold working of native copper , 2) annealing , 3) smelting , and 4) the lost wax method .
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.
The earliest gold artifacts were discovered at the site of Wadi Qana in the Levant. [13] Silver is estimated to have been discovered in Asia Minor shortly after copper and gold. [14] There is evidence that iron was known from before 5000 BC. [15] The oldest known iron objects used by humans are some beads of meteoric iron, made in Egypt in ...
Tumbaga objects were often made using a combination of the lost wax technique and depletion gilding. An alloy of varying proportions of copper, silver, and gold (typically in a percentage ratio of 80:15:5) was cast. It was burned after removal, turning surface copper into copper oxide, which was mechanically removed.