Description
Attractive piece featuring two intact, mottled calcite crystals, one of which (35 mm) is set on siderite. Calcite reacts to UV light and fluoresces.
A classic from the Carceller quarry in Peyrebrune (Tarn), located 1 km from the better-known Rivet quarry.
Video of this specimen of UV-reactive calcite crystals:
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