
1) English girl name 2) Monoclinic mineral
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https://www.crosswordclues.com/clue/margarite

1) Pearl
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https://www.crosswordclues.com/clue/margarite

Margarite is a calcium rich member of the mica group of the phyllosilicates with formula: CaAl2(Al2Si2)O10(OH)2. It forms white to pinkish or yellowish gray masses or thin laminae. It crystallizes in the monoclinic crystal system. It typically has a specific gravity of around 3 and a Mohs hardness of 4. It is translucent with perfect 010 cleavage ...
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http://en.wikipedia.org/wiki/Margarite

• (n.) A mineral related to the micas, but low in silica and yielding brittle folia with pearly luster. • (n.) A pearl.
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http://thinkexist.com/dictionary/meaning/margarite/

(from the article `brittle mica`) ...silicate minerals that has calcium instead of potassium or sodium. The calcium substitution increases the aluminum-to-silicon ratio that enhances ... ...a basic aluminosilicate of calcium, magnesium, and iron. It occurs in chlorite schist (with talc) and in altered limestones. Clintonite is the ... ...
Found on
http://www.britannica.com/eb/a-z/m/34
Mar'ga·rite noun [ Latin
margarita , Greek ... a pearl; confer French
marguerite .]
1. A pearl. [ Obsolete]
Peacham. 2. (Min.) A mineral related to the micas, but low in silica and yielding brittle folia with pearly luster.
Found on
http://www.encyclo.co.uk/webster/M/23

Margarite is a metamorphic mineral related to the micas, but low in silica and yielding brittle folia with pearly lustre. It is associated with staurolite and tourmaline and has a relative hardness of 5.
Found on
http://www.probertencyclopaedia.com/browse/HM.HTM
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