AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Bolivia > Bournonite (cogwheel twins) and Quartz

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Bournonite (cogwheel twins) and Quartz from Machacamarca District, Cornelio Saavedra, Potosí, Bolivia

 
Bournonite (cogwheel twins) and Quartz from Machacamarca District, Cornelio Saavedra, Potosí, Bolivia

Bournonite (cogwheel twins) and Quartz from Machacamarca District, Cornelio Saavedra, Potosí, Bolivia

Bournonite (cogwheel twins) and Quartz from Machacamarca District, Cornelio Saavedra, Potosí, Bolivia

Bournonite (cogwheel twins) and Quartz from Machacamarca District, Cornelio Saavedra, Potosí, Bolivia

DESCRIPTION:No. 90118
Mineral:Bournonite (cogwheel twins) and Quartz
Locality:Machacamarca District, Cornelio Saavedra, Potosí, Bolivia
Description:Superb lustrous gray-metallic bournonite crystals, exhibiting classic cogwheel habit to 30 mm across, caused by fourling twins on the {110} plane. The two bournonite cogwheel twins grew on lustrous transparent colorless quartz crystals to 22 mm.
Overall Size:4x3.5x3 cm
Crystals:15-30 mm
Archived: For reference only

 

 

 

 

 

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