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Bolivia Bournonite – April 2020
Posted by: Raymond McDougall on 04.10.2020 | Filed under: Latest, Recent Mineral Updates

I’ve posted exquisite new specimens in this Bolivia Bournonite Update (click here). These bournonite crystals are from the Viboras Mine, Machacamarca District, Potosí, Bolivia. The locality has produced excellent bournonite specimens over the years, but the finds are have been sporadic, often years apart. The nature of the bournonite has varied from one find to the next, and some of the bournonite has been of modest lustre, sometimes dull, and of varying sharpness/definition. This latest find has produced sharp, lustrous bournonite crystals of the finest quality, exhibiting the classic “cogwheel” twinning.

Bournonite, Viboras Mine, Machacamarca District, Potosí, BoliviaBournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia – 5.2 cm

Bournonite, Viboras Mine, Machacamarca District, Potosí, BoliviaBournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia
Field of view 3.5 cm
Bournonite, Viboras Mine, Machacamarca District, Potosí, BoliviaBournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia – 4.2 cm
Bournonite, Viboras Mine, Machacamarca District, Potosí, BoliviaBournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia – 2.3 cm crystal group
Bournonite, Viboras Mine, Machacamarca District, Potosí, BoliviaBournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia – 4.1 cm
Bournonite, Viboras Mine, Machacamarca District, Potosí, BoliviaBournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia – 3.8 cm
Bournonite, Viboras Mine, Machacamarca District, Potosí, BoliviaBournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia – 4.9 cm
Bournonite, Viboras Mine, Machacamarca District, Potosí, BoliviaBournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia – 4.1 cm
Bournonite, Viboras Mine, Machacamarca District, Potosí, BoliviaBournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia – 4.0 cm
Bournonite, Viboras Mine, Machacamarca District, Potosí, BoliviaBournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia – 3.6 cm
Bournonite, Viboras Mine, Machacamarca District, Potosí, BoliviaBournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia – 2.9 cm
Bournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia -   Bournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia – 3.4 cm
Bournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia -   Bournonite, Viboras Mine, Machacamarca District, Potosí, Bolivia -