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Unformatted text preview: rather around them. Non-foliated Finely to coarsely crystalline Quartz Gneiss 2. Rock cleavage owing to parallel orientation of days and micas Foliated Coarsely crystalline; crinkled micas discernible Calcite or dolomite Schist 3. Rock cleavage owing to parallel orientation of days (in slate) Foliated Very finely crystalline; may exhibit slight sheen but more compact than shale Appearance of clay Slate 4. Sugary sparkle imparted by cleavage of calcite or dolomite crystals Non-foliated Finely to coarsely crystalline Silicates, mica, hornblende, Marble 5. Shiny black; conchoidal fracture Non-foliated Super-fine textured, tar like glossy Metamorphosed plant material Anthracite Coal...
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- Spring '10
- METAMORPHIC ROCK IDENTIFICATION, rock cleavage, Specimen number example, Foliated Foliated Finely, Coarsely crystalline