1) Beautiful stone 2) Cut mineral 3) Decorative stone 4) Gemstone 5) Gemstone mineral 6) Jewel mineral 7) Jewel 8) Mineral jewel 9) Mineral gemstone 10) Orthorhombic mineral 11) Polished jewel 12) Polished mineral 13) Prized stone 14) Precious gem 15) Prized mineral 16) Precious jewel 17) Precious stone
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https://www.crosswordclues.com/clue/boracite
Boracite is a magnesium borate mineral with formula: Mg3B7O13Cl. It occurs as blue green, colorless, gray, yellow to white crystals in the orthorhombic - pyramidal crystal system. Boracite also shows pseudo-isometric cubical and octahedral forms. These are thought to be the result of transition from an unstable high temperature isometric form on c...
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http://en.wikipedia.org/wiki/Boracite
• (n.) A mineral of a white or gray color occurring massive and in isometric crystals; in composition it is a magnesium borate with magnesium chloride.
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http://thinkexist.com/dictionary/meaning/boracite/
colourless, glassy borate mineral, magnesium chloroborate (Mg3B7O13Cl). It has been found as crystals embedded in sedimentary deposits of anhydrite, ... [1 related articles]
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http://www.britannica.com/eb/a-z/b/93
Bo'ra·cite noun (Min.) A mineral of a white or gray color occurring massive and in isometric crystals; in composition it is a magnesium borate with magnesium chloride.
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http://www.encyclo.co.uk/webster/B/80
Boracite is a mineral of a white or grey colour occurring massive and in isometric crystals. It has the formulae Mg3B7O13Cl and a relative hardness of 7. It occurs associated with beds of halite, anhydrite, and gypsum and is formed by the evaporation of bodies of salt water.
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http://www.probertencyclopaedia.com/browse/HB.HTM
(Magnesium Borate Chloride) Boracite is an interesting borate mineral. It has good color, clarity and hardness to be a gemstone and yet it is rarely cut for this purpose. Probably because it is slightly soluble in water and ordinary wear dulls its surface. It is an attractive mineral for mineral specimens though. Boracite is s...
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https://www.encyclo.co.uk/local/23719
a strongly pyroelectric mineral, a borate and chloride of magnesium, MgClBO, occurring in white or colorless cubic crystals or fine-grained masses.
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https://www.infoplease.com/dictionary/boracite
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