Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
monoclinicuncommonSulfosalts
Jamesonite
FePb4Sb6S14
This specimen features a dense, felted mass of fine, acicular to fibrous, steel-gray to black Jamesonite crystals, characteristic of its common habit.
Jamesonite Physical Properties
Mohs Hardness
2.5Crystal System
monoclinicLuster
metallicStreak Color
grayish blackCleavage
good on {001}Fracture
unevenSpecific Gravity
5.5Colors
steel-gray, lead-gray, dark gray, blackTransparency
opaqueType Locality
Concepción del Oro, Zacatecas, MexicoMineral Group
SulfosaltsUses
minor ore of lead, minor ore of antimony, collector's mineralAssociated Minerals
galena, sphalerite, pyrite, stibnite, quartz, siderite, calciteRarity
uncommonGeological Context
Jamesonite is typically found in low-to-moderate temperature hydrothermal veins, often occurring in lead-zinc-silver sulfide deposits. It forms in environments rich in lead, antimony, and sulfur.
