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
