Bournonite
TG
Tom Gressman
Not on EarthWonders
Help improve this recordNo owner is registered for this specimen yet. If it's yours or you know more about it, you can add the owner, provenance, publications and other details.
Bournonite crystals on matrix, 3.5 cm, from Potosi department, Bolivia. Photographed using iPhone SE camera software; edited/stacked with Lightroom and Photoshop on a desktop computer; no background replacement. Tom Gressman collection; Christi Cramer smartphone photo.
Product details
SpeciesBournonite
SizeMiniature
Dimensions3.5 cm
Added on08/17/2026
Publications
- Mineralogical Record 51 6 page 104
Learn more

Mineral guide
Learn about Bournonite
steel-gray to black sulfosalt famed for cogwheel twinning and metallic luster; prized by collectors for iconic gears and historic localities.Regional guide

Comments