Bournonite
What is it made of?
It is made of lead, copper, antimony and sulphur.
Other minerals in specimen.
Quartz
Where was it found?
Herodsfoot Mine, Liskeard, Cornwall, England .
What is it used for?
Bournonite is sought after by collectors because it is rare, especially when it forms well developed 'cogwheel' shaped crystals.
Actual size
9 x 6.5cm
