2.4 x 0.9 x 0.5 cm. An extremely fine DOUBLE RARITY thumbnail from Tsumeb. A cyan-blue crust of microcrystalline stranskiite is jauntily perched atop a translucent, pearlescent, silky leiteite. Stranskiite and leiteite are ULTRA RARE zinc arsenates and Tsumeb is the Type Locality for both species.
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