QUARTZ
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Luster: Nonmetallic |
Lab Book Description: |
Hardness: 7 |
Usually colorless, white, or gray but uncommon varieties occur in all colors; Transparent to translucent; Luster greasy; No cleavage; Forms hexagonal prisms and pyramids; SG = 2.7 |
Streak: White |
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Appears on these flash cards: vitreous luster; hardness of > 5.5 (greater than 5.5); no cleavage; crystal form; conchoidal fracture
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