Cassiterite from Frementor Mine, Tavistock District, Devon, England

Rare to find this in dealer's listings, this is a rich (and heavy!) specimen of actual tin/tungsten ore from an old English metal mine.

Dimensions: 8.4 x 6 x 5.5 cm
Species: Cassiterite, Wolframite
Locality: Frementor Mine, Tavistock District, Devon, England