Galena

Galena Gidiurska Mine, Madan, Bulgaria Size: 6.7 x 5 x 2.1 cm Photo Copyright © SpiriferMinerals

Chemical Formula: PbS
Locality: Joplin district of Missouri, Kansas, and Oklahoma and other world wide occurrences.
Name Origin: The Roman naturalist, Pliny, used the name galena to describe lead ore.

Galena, also called lead glance, is the natural mineral form of lead(II) sulfide. It is the most important ore of lead and an important source of silver.

Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms. It is often associated with the minerals sphalerite, calcite and fluorite.

Physical Properties

Cleavage: {001} Perfect, {010} Perfect, {100} Perfect
Color: Light lead gray, Dark lead gray.
Density: 7.2 – 7.6, Average = 7.4
Diaphaneity: Opaque
Fracture: Brittle – Generally displayed by glasses and most non-metallic minerals.
Hardness: 2.5 – Finger Nail
Luminescence: Non-fluorescent.
Luster: Metallic
Magnetism: Nonmagnetic
Streak: grayish black

Photos :

Galena Freiberg District, Erzgebirge, Saxony  Germany Specimen size: 4.7 × 3.7 × 2.4 cm = 1.9” × 1.5” × 0.9” Main crystal size: 2 × 1.7 cm = 0.8” × 0.7”  Photo Copyright © Fabre Minerals
Galena Gonderbach Mine, Fischelbach, Bad Laasphe, North Rhine-Westphalia, Germany Size: 4.5 x 2.5 x 1.8 cm Photo Copyright ©  danweinrich
Galena 11.0×9.5×8.3 cm United Keno Hill Mines, Elsa, Yukon, Canada Copyright © David K. Joyce Minerals
Baxter Springs, Picher Field, Tri-State District, Cherokee Co., Kansas, USA © 2002 John H. Betts
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