Bournonite (“cogwheel”)

Bournonite (“cogwheel”)I have to say up front that this piece simply is better than the photos indicate. The HIGH luster of the faces made it difficult to photograph. The specimen is in great shape overall, and the robust crystals with their sharp, well defined surfaces are very hard to find from this mine. The piece is twinned and shows the classic "cogwheel" shape that was made famous by the classic specimens from Cornwall, England. Great quality on the display side, and

It may be more of a Quartz specimen than a Cassiterite specimen

Specimen # BOL711B230

Specimen #BURMA22111

This specimen was collected in the early 1980’s

the piece looks better in person

Great quality all around

hydrated iron aluminum phosphate and some of the better and more unique specimens of this mineral come from Llallagua

Good quality all the way around

This piece features several stunning

or a suite of Bolivian specimens

and this piece is a great toenail sized specimen for somebody looking to own a rare and displayable piece

in ANY format