two yellow radioactives, Novacekite and Sklowdowskite in a matrix of gypsum/calcite from mexico
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Fine thumbnail of this unique radioactive mineral
2.2 x 1.6 x .6 cm
Super thumbnail of this rare mineral from Gabon!
1.1 x .6 x .2 cm
Great plate of calcite with bright yellow boltwoodite. Best location in the world for this mineral.
8.5 x 3.1 x 3 cm