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List of countries by aluminium production: Bauxite [7] Australia Guinea: List of countries by bauxite production: Bismuth [8] China Vietnam: List of countries by bismuth production: Copper [9] Chile Peru: List of countries by copper production: Chromium [10] South Africa Turkey: List of countries by chromium production: Gold [11] China Australia
This is a list of countries by diamond production, ... based on the British Geological Survey Mineral Statistics Summary for 2016. [3] 2016 Diamond production
Zambia is the world's second biggest producer, with its Kafubu River area deposits (Kagem Mines) about 45 km (28 mi) southwest of Kitwe responsible for 20% of the world's production of gem-quality stones in 2004. [28] In the first half of 2011, the Kagem Mines produced 3.74 tons of emeralds. [29]
A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, ... World production of corundum using this method reaches 1000 million carats a year.
Besides the gemstone varieties that show a play of color, the other kinds of common opal include the milk opal, milky bluish to greenish (which can sometimes be of gemstone quality); resin opal, which is honey-yellow with a resinous luster; wood opal, which is caused by the replacement of the organic material in wood with opal; [13] menilite ...
Ruby is a pinkish-red-to-blood-red-colored gemstone, a variety of the mineral corundum (aluminium oxide). Ruby is one of the most popular traditional jewelry gems and is very durable. Other varieties of gem-quality corundum are called sapphires. Ruby is one of the traditional cardinal gems, alongside amethyst, sapphire, emerald, and diamond. [3]
Currently, gem production totals nearly 30 million carats (6.0 tonnes; 6.6 short tons) of cut and polished stones annually, and over 100 million carats (20 tonnes; 22 short tons) of mined diamonds are sold for industrial use each year, as are about 100 tonnes (110 short tons) of synthesized diamond. [68]
Main jade producing countries. Jade is an umbrella term for two different types of decorative rocks used for jewelry or ornaments.Jade is often referred to by either of two different silicate mineral names: nephrite (a silicate of calcium and magnesium in the amphibole group of minerals), or jadeite (a silicate of sodium and aluminum in the pyroxene group of minerals). [1]
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