Andesine
a mineral, intermediate in the plagioclase feldspar group, having a play of colors and usually found as crystals in igneous rocks.
Historical Examples
These intermediate members are the lime-soda felspars known as oligoclase, andesine, labradorite and bytownite.
Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 2 Various
noun
a feldspar mineral of the plagioclase series consisting of an aluminium silicate of sodium and calcium. Formula: NaAlSi3O8.CaAl2Si2O8
andesine
(ān’də-zēn’)
A white, gray, green or yellow mineral of the plagioclase feldspar group. Andesine occurs in igneous rocks such as andesite and diorite. Chemical formula: (Na,Ca)(Si,Al)4O8.
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