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3.4" Metallic Bournonite Crystal on Quartz and Pyrite - Bolivia
This is a lustrous, .42" wide bournonite crystal that formed from a 3.4" wide pyrite and quartz aggregation. It was collected from the Machacamarca mining district (Colavi mining district) of Potosí, Bolivia. The bournonite exhibits the classic "cogwheel" shape.
This material likely came out of Viboras mine, an active silver mine that produces gorgeous bournonite, quartz, pyrite, and siderite associations. It comes with an acrylic display stand.
This material likely came out of Viboras mine, an active silver mine that produces gorgeous bournonite, quartz, pyrite, and siderite associations. It comes with an acrylic display stand.
Bournonite is a sulfosalt mineral in the titular bournonite group. It is a trithioantimoniate of antimony, lead, and copper. It can be found all over the world, most commonly in hydrothermal vein deposits and associated with sphalerite or siderite. The steel-gray crystals can form a repeated twinning habit known as cogwheel twinning: it has historically been called wheel-ore by Romanian miners near Baia Mare.
The lead and antimony in the bournonite can be harmful if absorbed into the blood stream by inhalation or ingestion. The crystals won't pose a health hazard just sitting on a shelf, but it's recommended that you wash your hands after handling.
Chemical Formula: PbCuSbS3
The lead and antimony in the bournonite can be harmful if absorbed into the blood stream by inhalation or ingestion. The crystals won't pose a health hazard just sitting on a shelf, but it's recommended that you wash your hands after handling.
Chemical Formula: PbCuSbS3
SPECIES
Bournonite, Pyrite & Quartz
LOCATION
Machacamarca Mining District (Colavi Mining District), Potosí, Bolivia
SIZE
Bournonite crystal: .4" wide, Entire specimen: 3.4 x 2.4"
CATEGORY
ITEM
#248548
