Well developed crystals of prismatic (Sparable Tin) Cassiterite are to be seen in several cavities of a dense Chloritic matrix, from the Dolcoath Mine, probably one of Cornwall's most famous tin/copper mines. Crystals of Sparable Tin measure to 8mm with a deep brown colour, scattered in cavities on crystallized botryoidal deep green Chlorite, and minor light brown Goethite. One crystal displaying a sharp sparable V-twin Cassiterite. Classic variety of Cassiterite from the deepest mine in Cornwall.