Cassiterite
St Agnes, Cornwall, England, UK
Cassiterite twins from the famous St. Agnes District are seldom as good as this. An impressive, 1.6 cm, splendent, sharp, jet-black, heart-shaped cassiterite twin is perched atop a dense field of smaller crystals on matrix. This is an excellent old-time specimen. Ex. Herb Obodda specimen.
© Rob Lavinsky & irocks.com