The mineral Oldsite-(K) (originally known as just oldsite) is an extremely rare secondary uranium mineral. Mindat +1
It is found in only 1 confirmed locality
worldwide.
The single known location where it occurs is its type locality:
The North Mesa Mine Group (specifically the Temple Mountain Mining District, Emery County, Utah, USA).
This piece is yellow Oldsite-K on the bitumen host rock Aphaltite containing Uraninite.
Temple Mountain is in the remote San Rafael Swell and looks like a huge ruined Temple. A very special rock from a special place.
8.5x4.7x2.8 cm
74 grams
120,000 cpm on Radiacode 110
From the onky known occurence of this extremely rare mineral! Type and ONLY locality.
S4