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释义
the world > the earth > minerals > types of mineral > silicates > tectosilicate > [noun] > feldspar > mixed or intergrowth feldspars (7)
jade1595

A name given to two distinct minerals which from their hardness have been used for implements and… jadeite, a silicate of sodium and aluminium…

granitone1811

(See quot. 1794.)

saussurite1811

A very compact variety of zoisite. saussurite-gabbro n. a variety of gabbro in which the component feldspar and diallage have been partly altered to…

aventurine feldspar1816

a mixture of oligoclase and orthoclase spangled with yellowish or reddish crystals.

perthite1843

A variety of alkali feldspar usually consisting of roughly parallel intergrowths of an exsolved sodium-rich phase (as albite) and a potassium-rich…

myrmekite1911

An intergrowth of plagioclase containing drops or wormlike forms of quartz.

aventurine sunstone-

= aventurine feldspar n.

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