Mineral Name? Mineral group: Luster: nonmetallic Hardness: 1 Specific gravity: 2

Question

Mineral Name? Mineral group: Luster: nonmetallic Hardness: 1 Specific gravity: 2.2 Feel: greasy Used in pencil lead Mineral Name? Mineral group: Luster: nonmetallic Hardness: 3 Cleavage: three directions at 75 degrees (rhombohedral) Property: effervesces in HCI Common mineral in limestone Mineral Name? Mineral group: Luster: nonmetallic: fibrous, silky Hardness: 2 (easily scratches with fingernail) Cleavage: 3 directions Used in plaster Mineral Name? Mineral group? Luster: metallic Hardness: 1 Specific gravity: 5.2 Form: cubic crystals Also known as fool's gold Mineral Name? Mineral group? Luster: nonmetallic Hardness: 6-7 Crystal structure composed of isolated silica-oxygen tetrahedral Major mineral in Earth's mantle

Explanation / Answer

Question no 6 Answer

Mineral name is Graphite.

It belongs to carbon group of minerals.

It has formula "C".

It has hardness 1-2 compare to Mohr's hardness scale.

It has metallic luster.

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