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Rusty Gold Mine, Jamestown Mining District, Boulder County, Colorado, USA
Black micro-granular aggregate; 2.5x2.3x2cm; Collection of Rudy Bolona.
Rusty Gold Mine, Jamestown Mining District, Boulder County, Colorado, USA
Solid, micro-crystalline aggregate of this complex rare earth silicate; 4 x 3.2 x 2.7 cm; Since this piece is a solid chunk I was able to obtain a specific gravity of 4.47 and it registered 275 CPM on a Radalert 100 digital Geiger counter. Collected by Philip Persson.
Rusty Gold Mine, Jamestown Mining District, Boulder County, Colorado, USA
I bought this from Michael Shannon in 2021. My Si-PIN XRF shows it is rich in LREEs, Fe, Sr, and Y with some Th and U to make it radioactive.
Rusty Gold Mine, Jamestown Mining District, Boulder County, Colorado, USA
I bought this from Michael Shannon in 2021. My Si-PIN XRF shows it is rich in LREEs, Fe, Sr, and Y with some U (mostly hidden by Sr) to make it radioactive.
Rusty Gold Mine, Jamestown Mining District, Boulder County, Colorado, USA
Black micro-granular aggregate; 2.5x2.3x2cm; Collection of Rudy Bolona.
Rusty Gold Mine, Jamestown Mining District, Boulder County, Colorado, USA
Solid, micro-crystalline aggregate of this complex rare earth silicate; 4 x 3.2 x 2.7 cm; Since this piece is a solid chunk I was able to obtain a specific gravity of 4.47 and it registered 275 CPM on a Radalert 100 digital Geiger counter. Collected by Philip Persson.
Rusty Gold Mine, Jamestown Mining District, Boulder County, Colorado, USA
I bought this from Michael Shannon in 2021. My Si-PIN XRF shows it is rich in LREEs, Fe, Sr, and Y with some Th and U to make it radioactive.
Rusty Gold Mine, Jamestown Mining District, Boulder County, Colorado, USA
I bought this from Michael Shannon in 2021. My Si-PIN XRF shows it is rich in LREEs, Fe, Sr, and Y with some U (mostly hidden by Sr) to make it radioactive.
