Thorogummite
ソログマイト
0.69 ct
Polygon
5.50 x 5.50 mm
USA
max9267

Thorogummite

Is a Thorium Uranium Silicate Hydroxide with formula (Th, U)2(SiO4)(2 - X)(OH)4X and hardness of 5-5.5.Here we have a brown to black Thorite-(Fe) altering to yellow Thorogummite, with 'cyrtolite' zircon,  synchysite-(Y) (red rice-grain like crystals; abundant), fluorite, uranophane, fluorite and monazite from Foxton, South Platte NYF (Niobium-Yttrium-Fluorine type) Pegmatite district, Jefferson County, Colorado USA. Radioactive rare material.