This old-time Carlsbad-twin of orthoclase is completely replaced by granular cassiterite. This thumbnail is exceptionally sharp for Wheal Coates, Cornwall, England. Ex. Ward’s Natural Science Establishment
This old-time Carlsbad-twin of orthoclase is completely replaced by granular cassiterite. This thumbnail is exceptionally sharp for Wheal Coates, Cornwall, England. Ex. Ward’s Natural Science Establishment