1) Beautiful stone 2) Cut mineral 3) Decorative stone 4) Gemstone 5) Gemstone mineral 6) Jewel mineral 7) Jewel 8) Mineral gemstone 9) Mineral jewel 10) Potassium mineral 11) Polished jewel 12) Polished mineral 13) Precious gemstone 14) Prized stone 15) Precious stone 16) Precious jewel 17) Precious gem
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https://www.crosswordclues.com/clue/microcline
Microcline (KAlSi3O8) is an important igneous rock-forming tectosilicate mineral. It is a potassium-rich alkali feldspar. Microcline typically contains minor amounts of sodium. It is common in granite and pegmatites. Microcline forms during slow cooling of orthoclase; it is more stable at lower temperatures than orthoclase. Sanidine is a polymorph...
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http://en.wikipedia.org/wiki/Microcline
• (n.) A mineral of the feldspar group, like orthoclase or common feldspar in composition, but triclinic in form.
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http://thinkexist.com/dictionary/meaning/microcline/
a common feldspar mineral, one form of potassium aluminosilicate (KAlSi3O8) that occurs in igneous rock. Green specimens are called amazonstone, ... [3 related articles]
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http://www.britannica.com/eb/a-z/m/85
A common mineral in the feldspar group, occurring in igneous rocks as vitreous crystals of various colors. It has the same chemical composition as orthoclase, and differs from it only in the arrangement of the silicon and aluminum atoms.
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http://www.daviddarling.info/encyclopedia/M/microcline.html
Mi'cro·cline noun [
Micro- + Greek ... to incline.]
(Min.) A mineral of the feldspar group, like orthoclase or common feldspar in composition, but triclinic in form.
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http://www.encyclo.co.uk/webster/M/61
Microcline is a mineral with the formulae KAlSi3O8 and a relative hardness of 7. It has the same composition as orthoclase but is distinguished by triclinic twinning (usually requiring a microscope to detect). If a feldspar is a deep green it is microcline - and sometimes called 'amazon stone' or amazonite after the Amazon river. It is recognisable...
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http://www.probertencyclopaedia.com/browse/HM.HTM
Potassium aluminosilicate
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http://www.translationdirectory.com/glossaries/glossary075.htm
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