This piece comes from a larger specimen of material that was mined in the 1890s to 1900 era!! Jachymov is the Type Locality for Uraninite. This "Gummite" material has been tested and has many rare minerals in it. Very high grade ore and beautiful looking piece with a ton of history behind it!
4.8x3.3x2.3 cm
35.7 grams
Jachymov, CZ Type Locality for Uraninite
500,000 cpm on Radiacode 110
O4