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Bournonite (“cogwheel”) on matrix
Bournonite (“cogwheel”) on matrix Bournonite (“cogwheel”) on matrix Bournonite (“cogwheel”) on matrix Bournonite (“cogwheel”) on matrix
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Bournonite (“cogwheel”) on matrix (Ref: 821505695)

Viboras Mine, Machacamarca, Machacamarca District (Colavi District), Cornelio Saavedra Province, Potosi Department, Bolivia
91mm x 47mm x 38mm
minID: Q6M-NQC
To find a fine quality cogwheel such as this on matrix from Machacamarca is not common, and the photos honestly do not do this piece justice as it is much more eye-catching in person. This piece features a few attractive cogwheel-twinned crystal groups of Bournonite with superb luster sitting atop
From: Mineral Classics
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See Also

Bournonite
Viboras Mine, Machacamarca mining dstrict, Cornelio Saavedra Province, Potosi, Bolivia
$355 *
48mm x 38mm x 20mm
From: Taranis Minerals
Bournonite
Machacamarca Mine, Potosi Dept., Bolivia
$90
24mm x 23mm x 15mm
From: Marin Minerals
Bournonite
Machacamarca Mine, Potosi Dept., Bolivia
$150
25mm x 23mm x 15mm
From: Marin Minerals
Bournonite on Sphalerite
Machacamarca Mine, Potosí Department, Bolivia
$200
82mm x 60mm x 30mm
From: Marin Minerals
Bournonite
Machacamara District, Potosi Dept., Bolivia
$225
33mm x 32mm x 22mm
From: Marin Minerals
Bournonite on Siderite
Julcani Mine | Julcani District | Angaraes Province | Huancavelica | Peru
$337 *
90mm x 42mm x 14mm
From: Wendel Minerals
Bournonite, quartz GREECE!
Olympiada Mine, Kassandra Mining District, Chalkidiki, Greece
$90
30mm x 30mm x 12mm
From: Spirifer Minerals
Bournonite, arsenopyrite GREECE!
Olympiada Mine, Kassandra Mining District, Chalkidiki, Greece
$90
38mm x 30mm x 13mm
From: Spirifer Minerals
Bournonite
Mitsumine, Chichibu mining district, Nakatsugawa, Ohtaki-mura, Chichibu City, Saitama Prefecture, Japan
$140
10mm x 6mm x 5mm
From: Marin Minerals
Bournonite, quartz GREECE!
Olympiada Mine, Kassandra Mining District, Chalkidiki, Greece
$180
60mm x 45mm x 15mm
From: Spirifer Minerals
Bournonite on Siderite
Julcani Mine | Julcani District | Angaraes Province | Huancavelica | Peru
$421 *
62mm x 51mm x 34mm
From: Wendel Minerals
Siderite, Quartz, Bournonite, Pyrite.
Mésage Mine, Vizille, France.
$133 *
50mm x 40mm x 27mm
From: A Bijoux
Baryte, Bournonite, Siderite.
Mésage Mine, Vizille, France.
$152 *
55mm x 25mm x 20mm
From: A Bijoux
Bournonite
Potosi Department, Bolivia
$475
38mm x 30mm x 25mm
From: Marin Minerals
Bournonite
Yaogangxian Mine, Yizhang County, Chenzhou Prefecture, Hunan Province, China
$375
28mm x 12mm x 11mm
From: Bob Griffis Minerals
* price is an approximate conversion and may not be accurate.

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