Gel 100 mineral identification worksheet Tale: property: greasy cleavage: none streak: light grey hardness: 1 Luster: pearly Mica (biotite) Property: none Cleavage: 1 streak: green and yellow hardness: 1 Luster: dull Graphite Property: greasy feel Cleavage: 1 streak: grey hardness: 1 luster: metalic Galena Property: cubic crystals Cleavage: 3 streak: black hardness: 3 luster: metalic Hematite Property: tiny flakes Cleavage: none streak: red brown hardness: 6 luster: metalic Pyrite Property: gold color Cleavage: none streak: green/black hardness: 6 luster: metalic Calcite property: it fizzes Cleavage: 3 Streak: white hardness: 3 Luster: dull/earthy Halite Property: tastes salty cleavage: 3 streak: none hardness: 2.5 luster: colorless/grey Hornblende property: splintery appearance cleavage: 2 streak: none hardness: 5 luster: non-metalic Potassium (k) Feldspar property: pink cleavage: 2 streak: none hardness:6 luster: dull/earthy Plagioclase Feldspar property: straight/parallel striations cleavage: 2 streak: none hardness: 6 luster: dull Garnet property: 12 sided crystal cleavage: none streak: none hardness: 7 luster: non-metalic Quartz property: none cleavage: none streak: none hardness:7 luster: non-metalic
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