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List of Gemstones: Precious and Semi-Precious Stones - Gem ...
Chrysoprase is apple-green chalcedony that derives its color from nickel. Its hardness and striking ... View Profile. Cinnabar ... Star kornerupine also has been found (Mogok, Myanmar) but is very rare. Kornerupine is generally dar ... View Profile ... gem-quality magnesite is rare and beautiful, with colors ranging from colorless, white, ...
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Faux minéraux et fossiles — Wikipédia
Faux minéraux et fossiles: Agate colorée artificiellement en bleu.: Les faux minéraux et fossiles sont des minéraux (ou gemmes, c'est-à-dire minéraux remarquables) et fossiles non naturels, fabriqués par l'homme. Il peut s'agir soit d'un minéral ou fossile naturel transformé par l'homme pour en faire un autre, soit d'un minéral ou fossile entièrement artificiel.
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Jindalee to spin out Australian assets, focus on US lithium mine
Apr 12, 2022 · The spin-out of the assetses after Jindaleepleted a review of its portfolio of mines, across Western Australia offering exposure to iron, copper, nickel, magnesite, and gold.
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Cinnabar: Mineral information, data and localities.
1910.1000 TABLE Z-1 - TABLE Z-1 Limits for Air ...
1 The PELs are 8-hour TWAs unless otherwise noted a (C) designation denotes a ceiling limit. They are to be determined from breathing-zone air samples. (a) Parts of vapor or gas per million parts of contaminated air by volume at 25 °C and 760 torr.
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1926.55 - Gases, vapors, fumes, dusts, and mists ...
Footnotes to Tables 1 and 2 of this section: 1 [Reserved]. 2 See Table 2 of this section.. 3 Use Asbestos Limit §1926.1101.. 4 [Reserved]. 5 See Table 2 of this section for the exposure limit for any operations or sectors where the exposure limit in §1926.1153 is stayed or is otherwise not in effect. *An “X” designation in the “Skin Designation” column indicates that the substance is ...
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World Mining Data 2020
1. Volume 35 C. R eichl, M. S chatz Minerals Production . Vienna, 2020 World Mining Data 2020 Iron and Ferro -Alloy Metals Non-Ferrous Metals Precious Metals