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Mineral Desc
Term | Definition |
---|---|
Specular Hematite | 6 hardness Uneven Fracture Metallic Luster Reddish-Brown Streak Brittle Tenacity Opaque Diaphaneity Oxide Composition group *Used for Iron ore |
Milky Quartz | 7 hardness Uneven to conchoidal fracture Vitreous/waxy/greasy luster Brittle tenacity Translucent diaphaneity Silicate Composition group *Used for Jewelry, Abrasives, rock former |
Muscovite | 2-2.5 hardness 1 direction (basal) cleavage Waxy/greasy luster Brittle tenacity Translucent diaphaneity Silicates Composition group *Used for lubricant and insulation |
Crystal Garnet | 7 hardness Uneven/conchoidal fracture 12 sided crystals (dodecahedral) crystal habit Vitreous to resinous luster Brittle tenacity Opaque diaphaneity Silicate Composition group *Used for jewelry and abrasives |
Limonite | 1.5 hardness Uneven fracture Dull/earthy luster Yellowish brown streak Brittle tenacity Opaque diaphaneity Oxide Composition group *Used for Iron Ore |
Hornblende | 5.5 hardness 2 directions @60 & 120 degree cleavage Waxy/dull cleavage Brittle tenacity Opaque diaphaneity Silicate Composition group *Used for rock former |
Rose Quartz | 7 hardness Uneven/conchoidal fracture Vitreous/waxy/greasy luster Brittle tenacity Translucent diaphaneity Silicate Composition group *Used for Jewelry, Abrasives, rock former |
Plagioclase | 6-6.5 hardness 2 directions @ 90 degree cleavage Vitreous/waxy/pearly luster Brittle tenacity Translucent/opaque diaphaneity Silicate Composition group *Used for rock former |
Hematite | 1.5 hardness Uneven fracture Dull/earthy luster Reddish brown streak Brittle tenacity Opaque diaphaneity Oxide Composition group *Used for Iron Ore |
Halite | 2.5 hardness 3 directions @ 90 degree cleavage Vitreous/greasy luster Brittle tenacity Transparent/translucent diaphaneity Halide Composition group *Used for Salt and preservation |
Pyrite | 6-6.5 hardness Uneven/conchoidal fracture Cubic crystal habit Metallic luster Greenish-black streak Brittle tenacity Opaque diaphaneity Sulfide Composition group *Used for Sulfuric acid and batteries |
Graphite | 1-2 hardness Uneven fracture Metallic/sub-metallic luster Black/steel gray streak Sectile tenacity Opaque diaphaneity Native element Composition group *Used for lubricant and pencils |
Olivine | 6.5-7 hardness Uneven to conchoidal fracture Vitreous luster Brittle tenacity Translucent/opaque Diaphaneity Silicate Composition group *Used for jewelry and rock former |
Orthoclase | 6 hardness 2 directions @ 90 degrees cleavage Vitreous/waxy/greasy luster Brittle tenacity Opaque diaphaneity Silicate Composition group *Used as a rock former |
Garnet | 7 hardness Uneven/conchoidal fracture Vitreous/waxy/greasy luster Brittle tenacity Translucent/opaque diaphaneity Silicate Composition group *Used for Jewelry, abrasives and rock former |
Amethyst (Quartz) | 7 hardness Uneven/conchoidal fracture Vitreous/waxy/greasy luster Brittle tenacity Translucent/Transparent diaphaneity Silicate Composition group *Used for Crystals, industry and rock former |
Galena | 3.5 hardness 3 directions @ 90 (cubic) degrees cleavage Metallic luster Gray streak Brittle tenacity Opaque diaphaneity Sulfide Composition group *Used for Lead ore |
Sulfur | 1.5-2.5 hardness Uneven fracture Resinous luster Brittle tenacity Transparent/translucent diaphaneity Native element Composition group *Used for Sulfuric acid, fertilizers, gunpoweder |
Fluorite | 4 hardness 4 direction cleavage Vitreous/waxy/resinous lsuter Brittle tenacity Transparent/translucent diaphaneity Halide Composition group *Used for Flux in steel making, toothpaste |
Sphalerite | 3.5-4 hardness 6 direction cleavage Resinous luster Light yellow streak Brittle tenacity Opaque diaphaneity Sulfide Composition group *Used for zinc ore |
Dolomite | 3.5-4 hardness 3 directions @ 75 degree cleavage Vitreous/pearly.waxy luster Brittle tenacity Transparent/translucent/opaque diaphaneity Carbonate Composition group *Used for rock former |
Corundum | 9 hardness Uneven fracture Dull luster Brittle tenacity Opaque diaphaneity Oxide Composition group *Used for abrasive, rock former |
Smokey quartz | 7 hardness Uneven/conchoidal fracture Vitreous/waxy/greasy luster Brittle tenacity Translucent/opaque diaphaneity Silicate Composition group *Used for industry, abrasive, rock former |
Copper | 2.5-3 hardness Uneven/irregular fracture Metallic luster Copper-red streak Malleable tenacity Opaque diaphaneity Native element Composition group *Used for Wiring, metal alloys, heat exchangers |
Quartz crystal | 7 hardness Uneven/conchoidal fracture 6-sided crystal w/ triangular termination faces - crystal habit Vitreous luster Brittle tenacity Translucent diaphaneity Silicate Composition group *Used for jewelry, abrasives, rock former |
Chalcopyrite | 3.5-4 hardness Uneven or irregular fracture Metallic luster Greenish-black streak Brittle tenacity Opaque diaphaneity Sulfide Composition group *Used for copper ore |
Calcite | 3 hardness 3 directions @ 75 degree (rhombic) cleavage Vitreous/waxy/dull luster Brittle tenacity Transparent/Translucent/Opaque diaphaneity Carbonate Composition group *Used as rock former |
Magnetite | 6 hardness Uneven fracture Metallic luster Black streak Brittle tenacity Opaque diaphaneity Oxide Composition group *Used as Iron ore |
Biotite | 2.5-3 hardness 1 direction (basal cleavage) Resinous/sub-resinous luster Elastic tenacity Opaque/transparent diaphaneity Silicate Composition group *Used for lubricant |
Augite | 6 hardness 2 directions @ 90 degrees cleavage Waxy/dull luster Brittle tenacity opaque diaphaneity Silicate Composition group *Used as rock former |
Talc | 1 hardness Good in 1 direction (basal) cleavage Pearly or silky cleavage Sectile Tenacity Translucent/opaque diaphaneity Silciate Composition group *Used for powder |
Apatite | 5 hardness Uneven or irregular fracture Viretous/Sub-resinous/dull luster Brittle tenacity Opaque diaphaneity Phosphate Composition group *Used as fertilizer |
Gypsum | 2 hardness Good in 1, poor in 2 cleavage Vitreous, pearly or silky luster Flexible tenacity Transparent/opaque diaphaneity Sulfate Composition group *Used as Soil conditioner, sheetrock, plaster of paris |