Half-geode of septaria (0.9 kg) from Poland, in a vertical circular stand
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Amethyst from Uruguay (600g) in 3D frame
Brazilian agate geode, on sliding machine
Gypsum crystal from France, 57cm on brass base
Aragonite crusted pipe from Karlovy Vary
Utah Septaria Slice - Muddy Creek - USA, in brass adjustable round stand
