1937 Cassiterite, Topaz, Torbernite, Royal George Mine, Avoca-Royal George mining district, Northern Midlands municipality, Tasmania

Sharp crystals of cassiterite ranging in colour from yellow through grey and brown to black, some zoned, with white topaz (to the right and slightly below the main cassiterite crystal) and green torbernite (not in photo). Width of view 9.5mm. Stack of 55 images.

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