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Amethyst is a violet variety of quartz.The name comes from the Koine Greek αμέθυστος amethystos from α - a-, "not" and μεθύσκω (Ancient Greek) methysko / μεθώ metho (Modern Greek), "intoxicate", a reference to the belief that the stone protected its owner from drunkenness. [1]
Group of precious and semiprecious stones—both uncut and faceted—including (clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem , jewel , precious stone , semiprecious stone , or simply gem ) is a piece of mineral crystal which, when cut or ...
PT Aneka Tambang Tbk, colloquially known as Antam, is an Indonesian mining company. The company primarily produces gold and nickel, and is the largest producer of nickel in Indonesia . Until 2017, Antam was a directly state-owned company , before its ownership was transferred to PT Mineral Industri Indonesia (Persero) or MIND ID, a government ...
Prasiolite (also known as green quartz, green amethyst or vermarine) is a green variety of quartz. Since 1950, almost all natural prasiolite has come from a small Brazilian mine, [ citation needed ] but it has also been mined in the Lower Silesia region of Poland .
Lab-grown diamonds of various colors grown by the high-pressure-and-temperature technique. A synthetic diamond or laboratory-grown diamond (LGD), also called a lab-grown diamond, [1] laboratory-created, man-made, artisan-created, artificial, synthetic, or cultured diamond, is a diamond that is produced in a controlled technological process (in contrast to naturally formed diamond, which is ...
Telkom Indonesia: Bandung: 9.8 1.6 18.2 18.6 Telecommunication 5 944 Bank Negara Indonesia: Jakarta 5.4 1.4 67.3 12.1 Banking 6 1194 Bayan Resources: Jakarta 3.3 1.0 2.9 39.6 Coal mining 7 1591 Chandra Asri Petrochemical: Jakarta 2.1 0.0 5.4 49.3 Oil and gas 8 1605 Amman Mineral Internasional: Jakarta 2.0 0.3 9.9 46.6 Mining 9 1738 Adaro Energy ...
Small-scale mining of tin in modern Indonesia might have begun in Bangka by the 7th century; some exports of tin from Bangka are dated to the 13th century. After the arrival of the Dutch in the region, the Dutch East India Company (VOC) signed a treaty with the Palembang Sultanate which granted the VOC monopoly rights over Bangka's tin trade in ...
Together with Kompas Gramedia Group, Sinar Mas Land has built ICE on 22 hectares of land in Bumi Serpong Damai, which is the largest convention and exhibition centre in Indonesia. [30] The ICE, started in 2012 and completed in 2016, equipped with 10 exhibition halls, a convention center, and a 300-room hotel on site.