titanite

titanite

[tahyt-n-ahyt]
noun Mineralogy.

Origin:
1790–1800; < German Titanit. See titanium, -ite1

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titanite (ˈtaɪtəˌnaɪt)
 
n
another name for sphene
 
[C19: from German Titanit, so named because it contained titanium]

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titanite

titanium and calcium silicate mineral, CaTiSiO4(O,OH,F), that, in a crystallized or compact form, makes up a minor component of many igneous rocks and gneiss, schist, crystalline limestone, and pegmatite. Occurrences include the Tirol, Austria; Trentino, Italy; Norway; Switzerland; Madagascar; and the United States (New York). Titanite's relatively high dispersion causes it to be a brilliant gem of various colours; it is usually faceted. For detailed physical properties, see silicate mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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