Image: <bdi><a href="https://www.wikidata.org/wiki/Q126871368" class="extiw" title="d:Q126871368"><span title="photographer from the United States">Darla Sondrol</span></a></bdi> (CC0)
monoclinicuncommonsulfides
Boulangerite
Pb5Sb4S11
Boulangerite typically forms as fibrous, acicular, or plumose aggregates, often with a metallic lead-gray to steel-gray color, as seen in the image.
Boulangerite Physical Properties
Mohs Hardness
2.5Crystal System
monoclinicLuster
metallicStreak Color
reddish-brown to blackCleavage
good on {010}Fracture
unevenSpecific Gravity
6.2Colors
lead-gray, bluish-gray, steel-gray, blackish-grayTransparency
opaqueType Locality
Molières, Gard, FranceMineral Group
sulfidesUses
ore of lead, ore of antimony, collectorAssociated Minerals
galena, sphalerite, pyrite, arsenopyrite, tetrahedrite, bournonite, stibnite, quartz, sideriteRarity
uncommonGeological Context
This sulfosalt mineral forms in low-temperature hydrothermal veins, commonly found in lead-zinc deposits where it is associated with other sulfide minerals.
