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Bournonite (cogwheel twins) from Viboras Mine, Machacamarca, Saavedra Province, Potosí, Bolivia

 
Bournonite (cogwheel twins) from Viboras Mine, Machacamarca, Saavedra Province, Potosí, Bolivia

Bournonite (cogwheel twins) from Viboras Mine, Machacamarca, Saavedra Province, Potosí, Bolivia

Bournonite (cogwheel twins) from Viboras Mine, Machacamarca, Saavedra Province, Potosí, Bolivia

Bournonite (cogwheel twins) from Viboras Mine, Machacamarca, Saavedra Province, Potosí, Bolivia

Bournonite (cogwheel twins) from Viboras Mine, Machacamarca, Saavedra Province, Potosí, Bolivia

Bournonite (cogwheel twins) from Viboras Mine, Machacamarca, Saavedra Province, Potosí, Bolivia

Bournonite (cogwheel twins) from Viboras Mine, Machacamarca, Saavedra Province, Potosí, Bolivia

Bournonite (cogwheel twins) from Viboras Mine, Machacamarca, Saavedra Province, Potosí, Bolivia

Bournonite (cogwheel twins) from Viboras Mine, Machacamarca, Saavedra Province, Potosí, Bolivia

Bournonite (cogwheel twins) from Viboras Mine, Machacamarca, Saavedra Province, Potosí, Bolivia

DESCRIPTION:No. 80922
Mineral:Bournonite (cogwheel twins)
Locality:Viboras Mine, Machacamarca, Saavedra Province, Potosí, Bolivia
Description:Large lustrous gray-metallic bournonite crystals exhibiting classic cogwheel habit caused by fourling twins on the {110} plane. There are three bournonite cogwheel twins to 20 mm across that grew together and are easily distinguished. Ex. Miller #M3057; originally acquired in 2014
Overall Size:4x3.5x3 cm
Crystals:1-12 mm
Status: Sold - Posted here for reference only
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