1) Beautiful stone 2) Cut mineral 3) Decorative stone 4) Gemstone mineral 5) Gemstone 6) Industrial mineral 7) Jewel 8) Jewel mineral 9) Mineral jewel 10) Mineral gemstone 11) Polished mineral 12) Polished jewel 13) Prized stone 14) Precious gemstone 15) Precious stone 16) Precious jewel 17) Prized mineral
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https://www.crosswordclues.com/clue/alunite
Alunite is a hydrated aluminium potassium, sulfate mineral, formula KAl3(SO4)2(OH)6. It was first observed in the 15th century at Tolfa, near Rome, where it is mined for the manufacture of alum. First called aluminilite by J.C. Delamétherie in 1797, this name was contracted by François Beudant in 1824 to alunite. Alunite crystals morphologically...
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http://en.wikipedia.org/wiki/Alunite
• (n.) Alum stone.
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http://thinkexist.com/dictionary/meaning/alunite/
a widespread rock-forming sulfate mineral that occupies pockets or seams in volcanic rocks such as rhyolites, trachytes, and andesites, where it ... [1 related articles]
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http://www.britannica.com/eb/a-z/a/54
Al'u·nite noun (Min.) Alum stone.
Found on
http://www.encyclo.co.uk/webster/A/64
Alunite (alum stone) is a hydrated aluminium and potassium sulphate secondary mineral usually formed by sulphuric acid solutions acting on rocks rich in alkalic feldspar. It is used in the production of alum, the manufacture of styptic pencils, as a dye fixer in the treatment of leather and as a white pigment in paint. It has the formulae KAl3(SO4)...
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http://www.probertencyclopaedia.com/browse/HA.HTM
(Potassium Aluminum Sulfate Hydroxide) Alunite is also known as
alumstone and is a source of the chemical known as alum, KAl(SO 4 ) 2 - 12H 2 O. Some alunite has also been used to recover potassium and aluminum. Alunite forms from the action of sulfuric acids upon potassium rich feldspars in a process cal...
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https://www.encyclo.co.uk/local/23719
a mineral, a hydrous sulfate of potassium and aluminum, KAl(SO)(OH), commonly occurring in fine-grained masses. Also called
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https://www.infoplease.com/dictionary/alunite
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