Galena Archives - Cochise College Geology

Galena

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Chemical Group: Sulfide

Chemical Formula: PbS

Color: Lead-gray Streak: Lead-gray

Luster: Metallic luster Transparency: Opaque

Hardness: 2.5 Specific Gravity: 7.58 Cleavage: Cubic, 3 directions

Crystal Forms and Habits: Isometric system. Galena most commonly forms cubic crystals, octahedrons, and cubes modified by octahedron faces.

Mineral Associations: Commonly occurs with fluorite, anglesite, sphalerite

Identifying Characteristics: Metallic luster, high density, and the three good directions of cleavage

Uses: Lead ore Occurrences: Tri-State district

Toxicity: When-swallowed: high When-inhaled: very high

Additional Information: Chalcopyrite is an iron copper sulfide and an important ore of copper. The chalcopyrite crystals are the bright metallic yellow crystals sitting on top of a gray, cubic galena crystal.

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Photos

Galena 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

galena-cubic crystal with octahedron face — Galena-Cubic Crystal With Octahedron Face

galena-cube crystal — Galena-Cube Crystal

galena-cubic cleavage — Galena-Cubic Cleavage

galena-cubic crystal — Galena-Cubic Crystal

galena-cubic crystals — Galena-Cubic Crystals

galena-cubic crystal-oxidized surface — Galena-Cubic Crystal-Oxidized Surface

galena-galena in quartz — Galena-Galena In Quartz

galena-gray metallic-cubic cleavage — Galena-Gray Metallic-Cubic Cleavage

galena-gray crystal with yellow chalcopyrite — Galena-Gray Crystal With Yellow Chalcopyrite

galena-gray cubic crystals — Galena-Gray Cubic Crystals

galena-gray cubic crystals with pink fluorite — Galena-Gray Cubic Crystals With Pink Fluorite

galena-gray-massive — Galena-Gray-Massive

galena-octahedron crystal — Galena-Octahedron Crystal

galena-pyramidal growths of crystal surface — Galena-Pyramidal Growths Of Crystal Surface

galena-pyramiadal growths of crystal surface — Galena-Pyramiadal Growths Of Crystal Surface

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