Thorite v."Thorogummite" - Cheyenne Mountain, Colorado, USA

(Th,U)(SiO₄)_1-x(OH)_4x

A nice sample of dark-red Thorite v. "Thorogummite" from Cheyenne Mountain, Colorado, USA. According to Mindat:

Discredited as a valid species in 2014 (IMA14-B). This name has been used to describe heterogeneous mixtures of secondary, non-crystalline minerals, produced by the alteration, hydration, or metamictization of thorite.

Approx. size: 35mm x 25mm x 18mm

Approx. activity on an SE International Ranger EXP: 6300 cpm