Origin: Firefly-Pigmay mine, La Sal district, San Juan Co., Utah, U.S.A.
Sample size: 8 x 6 x 2 cm, crystals about 0.5 mm
Yellow earthy crust on dark, black
davidite
matrix
Origin: Olary, South Australia, Australia
Sample size: 4.5 x 4 x 2 cm
Light yellow, sparse powdery coating on black, heavy
davidite
Origin: Radium Hill, South Australia, Australia
Sample size: 4 x 2.5 x 2 cm
Vivid, bright yellow powdery crusts of carnotite replacing wood.
Origin: Melroy mine, Henry Mountains, Utah, United States
Ex. Robert Roots collection
Sample size: 4 x 3 x 2 cm
Origin: Jumbo #2, Blue Creek, Mesa Co., Colorado, United States
Ex. Kidwell collection
Sample size: 6 x 4 x 3 cm
Dakota Matrix Minerals
Origin: Mashamba, Katanga, Dem. Republic of the Congo
Sample size: 5 x 3.2 x 2.3 cm
Origin: Moab Valley, Grant County, Utah, U.S.A.
Ex. Isaias Casanova collection
Sample size: 4.5 x 3.4 x 3 cm
John Veevaert, Trinity Mineral Co
Origin: Rio Blanco Co., Colorado, U.S.A.
Origin: Colorado, U.S.A.