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Evansite (rare amorphous aluminum phosphate) shown here in small, deep-blue spherules.
3.9 x 3 x 1.9 cm
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A rare amorphous aluminum phosphate, evansite is shown here in...
Beautiful blue botryoidal gibbsite from China.3.5 x 2.2 x 1.5 cm
Beautiful blue botryoidal gibbsite from China.3 x 2 x 0.9 cm