Calcite (hand specimen)
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Description / Synopsis
Common Forms/Occurrences: Found in limestone, chalk, travertine, and onyx Useful Identification Test: Effervesces in dilute HCl Chemical formula: CaCO3 Crystal System: Prisms, rhombohedrons, or scalenohedrons that break into rhombohedrons Colour: Usually colourless, white, or yellow, but may be green, brown, or pink Streak: White Lustre: Nonmetallic (NM) Cleavage: Excellent in 3 directions not at 90° Fracture: Conchoidal; Brittle Hardness: 3 Hardness Search: three Specific Gravity: 2.7 |
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rm0026
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Use and Reproduction
Subject to the Copyright Act
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au_775.jpg2.53 MB
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English
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Name |
Calcite (hand specimen)
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