Mineralpedia Details for Jamesonite
Named to honor Robert Jameson, the Scottish mineralogist who was the first to describe the mineral. Jamesonite is a relatively common mineral with numerous localities including in England, Germany, the Czech Republic, Romania, Bolivia, Mexico, the United States, and China, which are all known for rich material. Jamesonite forms as a late stage mineral in lead-silver-zinc veins that formed at low to medium temperatures. Associated minerals include other lead sulfosalts, pyrite, sphalerite, galena, tetrahedrite, stibnite, quartz, siderite, calcite, dolomite, and rhodochrosite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/jamesonite.pdf
- Crystal System
- Crystal Habit
- Acicular, Radial, Massive - Fibrous
- Perfect, None, None
- lead gray, steel gray, dark lead gray
- black. grayish
- Monoclinic - Prismatic
- View Jamesonite
- View Jamesonite
Jamesonite from Mapimi dist., Durango, Mexico
Large cabinet specimen with face covered by filliform Jamesonite crystals associated with Pyrite.
Jamesonite from St. Endellion, Cornwall, England
Compact silvery fibrous metallic masses in Quartz.
Jamesonite from Wallace, Coeur d'Alene District, Shoshone Co., Idaho, United States
Tightly compacted acicular crystals of Jamesonite, an ore of lead.
This historic mining district is one of the world's largest concentrations of silver and has produced over 1.18 billion ounces of silver since 1884. Lead, zince, copper, and antimony has also contributed to over $2.89 billion worth of production. The district is located in the panhandle of Idaho and within the Coeur d'Alene Mountains of the the Bitterroot Range. The mines are hosted by the 1.4 BYA Proterozoic Belt Supergroup rocks.