Geology Minerals (Dark-colored nonmetallic)

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4 Terms

1
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<p>Hornblende</p>

Hornblende

Hardness: Hard (H>5.5)

Cleavage: Excellent cleavage, non-prismatic

Other: Black

2
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<p>Augite</p>

Augite

Hardness: Hard (H>5.5)

Cleavage: Excellent cleavage, prismatic

Other: Dark green to black

3
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<p><span>Hematite</span></p>

Hematite

[Fe2O3]

Hardness: Hard (H>5.5)

Cleavage: No cleavage

Other: Brick red

4
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<p>Biotite mica</p>

Biotite mica

Hardness: Soft (H<2.5)

Cleavage: Excellent cleavage

Other: Black

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