Igneous(1)

Igneous(1) - Rock-Forming Minerals Sample Number 1 Luster...

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Rock-Forming Minerals Sample Number Luster Hardness Streak Cleavage Other Properties Mineral Name Chemical Grouping 1 Vitreous 3.0 White, Grey 3, with Calcite Carbonate 1 @ 78º and 1 @ 102º 2 Vitreous 5.0 - 6.0 White, Grey-Green, 2, with Hornblende Brownish 1 @ 54º and needle-like form; (Amphibole) (Double-Chain Silicate) 1 @ 126º diamond-shaped cross-section 3 Vitreous 6.0 White 2 @ 90º Blebby texture (elongated "blobs" Orthoclase visible on cleavage surface (K-Feldspar) (Framework Silicate) 4 Vitreous 6.0 White 2 @ 90º Fine striae on cleavage faces; Albite light-colour (Na-Plagioclase) (Framework Silicate) 5 Vitreous 7.0 White None Quartz colours (Framework Silicate) 6 Vitreous 2.0 - 3.0 None 1 Biotite Brown, Brown-Black, Black Colour (Sheet Silicate) 7 Vitreous 6.0 White 2 @ 90º Coarse striae on cleavage faces; Anorthite/Labradorite iridescent (chatoyance); dark colour (Ca-Plagioclase) (Framework Silicate) 8 Vitreous 6.5 - 7.0 White, Yellowish None Grainy, "sugary" appearance;
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This note was uploaded on 04/21/2008 for the course GEOL 1601 taught by Professor Unk during the Spring '07 term at LSU.

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Igneous(1) - Rock-Forming Minerals Sample Number 1 Luster...

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