Mammoth Mine (Valentine Mine), Presidio Co., Texas

7.5 x 5.1 x 3.7 cm

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Ex. Steve Pullman

Ca(UO₂)₂[Si₅O₁₂(OH)₂]·6H₂O

An unusual specimen of Rhyolite with two uranium species present, one an oxide and the other a silicate. Both are located on the surface of spherical vugs within the Rhyolite. The Uraninite is present as an orange coloerd crust and the Haiweeite as small, yellow colored crystals.

Condition: Good

Flaws: Nothing Appreciable

This mineral is also found in the following galleries: Minerals From the United States | Nesosilicates | Rare Minerals | Minerals Priced Between 50 and 99 Dollars