David K. Joyce

Bournonite

$65.00
7.6x5.2x4.6 cm
Machacamarca
Cornelio Saavedra, Potosi
Bolivia

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Item number: 27889

This matrix is composed of aggregates of sphalerite with a sooty coating. On the top are several well formed "cogwheel" shaped twins of bournonite, the biggest one sort of star-shaped. The crystals are all sharp with prominent re-entrant angles that cause the cogwheel comparison. A couple of little nicks here and there. Displays very well!