Term
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Definition
Mineral: Calcite
Group: Carbonate
Formula: CaCO3
Shape: Cleaves into small rhombuses
Luster: Pearly
Hardness: 3-5 |
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Term
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Definition
Mineral: Biotite Mica
Group: Silicate
Formula: N/A
Shape: Cleaves into flat rectangles
Luster: Glassy/Pearly
Hardness: ↓2.5 |
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Term
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Definition
Mineral: Pyroxene
Group: Silicate
Formula: N/A
Shape: Cleaves
Luster: Earthy
Hardness: 3-5 |
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Term
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Definition
Mineral: Quartz
Group: Silicate
Formula: SiO2
Shape: Irregular Fracture
Luster: Glassy
Hardness: ↑6 |
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Term
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Definition
Mineral: Plagioclase Feldspar
Group: Silicate
Formula: N/A
Shape: Cleaves into two flat sides
Luster: Pearly/Glassy
Hardness: ↑6 |
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Term
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Definition
Mineral: Sulfur
Group: Native Element
Formula: S
Shape: Irregular Fracture
Luster: Earthy
Hardness: ↓2.5 |
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Term
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Definition
Mineral: Halite
Group: Halide
Formula: NaCl
Shape: Cleaves into cubes
Luster: Earthy
Hardness: 2.5-3 |
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Term
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Definition
Mineral: Hematite
Group: Oxide
Formula: Fe2O3
Shape: Irregular Fracture
Luster: Earthy
Hardness: 2.5-3 |
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Term
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Definition
Mineral: Hornblende
Group: Silicate
Formula: N/A
Shape: Cleaves into long shards
Luster: Glassy
Hardness: ↑6 |
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Term
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Definition
Mineral: Sphalerite
Group: Sulfide
Formula: ZnS
Shape: Irregular Fracture
Luster: Glassy
Hardness: 3-5 |
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Term
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Definition
Mineral: Magnetite
Group: Oxide
Formula: Fe3O4
Shape: Irregular Fracture
Luster: Metallic
Hardness: 5-6 |
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Term
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Definition
Mineral: Pyrite
Group: Sulfide
Formula: FeS2
Shape: Cleaves into cubes
Luster: Metallic
Hardness: ↑6 |
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Term
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Definition
Mineral: Muscovite Mica
Group: Silicate
Formula: N/A
Shape: Cleaves into flat sheets
Luster: Glassy
Hardness: ↓2.5 |
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Term
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Definition
Mineral: Olivine
Group: Silicate
Formula: N/A
Shape: Irregular Fracture
Luster: Earthy
Hardness: ↑6 |
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Term
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Definition
Mineral: Dolomite
Group: Carbonate
Formula: CaMg(CO3)2
Shape: Cleaves into rhombus
Luster: Glassy
Hardness: 3-5 |
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Term
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Definition
Mineral: Potassium Feldspar
Group: Silicate
Formula: N/A
Shape: Cleaves into three flat sides
Luster: Glassy
Hardness: ↑6 |
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Term
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Definition
Mineral: Fluorite
Group: Halide
Formula: CaF2
Shape: Cleaves into two flat sides
Luster: Glassy
Hardness: 3-5 |
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Term
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Definition
Mineral: Galena
Group: Sulfide
Formula: PbS
Shape: Cleaves into cubes
Luster: Metallic
Hardness: 3-5 |
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Term
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Definition
Mineral: Graphite
Group: Native Element
Formula: C
Shape: Irregular Fracture
Luster: Metallic
Hardness: ↓2.5 |
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Term
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Definition
Mineral: Talc
Group: Silicate
Formula: N/A
Shape: Irregular Fracture
Luster: Pearly
Hardness: ↓2.5 |
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