PLAGIOCLASE FELDSPAR
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Luster: Nonmetallic |
Lab Book Description: |
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Hardness: 6 |
Colorless, white, gray, or black; may have iridescent play of color from within; Translucent; Forms striated tabular crystals or blades; Cleavage good in two directions at nearly 90 degrees; SG = 2.6 to 2.8 | |
Streak: White |
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Appears on these flash cards: hardness of > 5.5 (greater than 5.5); 2 planes of cleavage; used to make ceramics, enamel, and false teeth; striations
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