- Thumbnail, 1.6 x 1.1 x 0.8 cm
- Bristol Copper Mine, Bristol, Hartford Co., Connecticut, USA
An aesthetic, old-time thumbnail specimen of sharp, striated, lustrous, dark metallic-gray chalcocite prisms from the Bristol Copper Mine, Connecticut. 100+ years old, these are considered to be some of the very best chalcocites from anywhere in the world. Classic material. Ex. Irv Brown Thumbnail Collection.