Physical Geology Assignment 1: Minerals Identify each of the following minerals

Question

Physical Geology Assignment 1: Minerals Identify each of the following minerals and the mineral group to which it belongs. Note the physical properties and consult the accompanying mineral identification key. Mineral groups are the silicates, carbonates, oxides, sulfides, sulfates, halides, and native elements. Physical Properties Questions 1. Mineral Name? Image Luster: nonmetallic Hardness: 4 Streak: white Cleavage: four directions Mineral group? 2. Mineral Name? Luster: nonmetallic Hardness: 3 Streak: red Cleavage: not prominent Mineral group? Ore of iron 3. Mineral Name? Luster: metallic Hardness: 2.5 Specific gravity: 7.6 Cleavage: cubic Mineral group? Ore of lead 4. Mineral Name? Luster: nonmetallic Hardness: 6 Specific gravity: 2.6 Cleavage: two directions at nearly right angles Mineral group? A common mineral in granite 5. Mineral Name? Luster: nonmetallic Hardness: 5-6 Specific gravity: 3.2 Cleavage: two directions at 60 degrees and 120 degrees Mineral group? Common in certain igneous rocks like andesite

Explanation / Answer

1)flourite and is belongs to halides

2) hematite, belongs to oxides

3) Galena , belongs to sulphides

4) orthoclase, belongs to silicate group

5) hornblende, belongs to silicate group

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