Here is an amazing example from the Madan ore field in Bulgaria of well formed UV reactive Manganoan Calcite crystal with splendid scalenohedral formations made by stacked intergrown disc shaped calcite crystals and which glow a delightful sweet bright neon watermelon pink to coral pink color under long wave ultraviolet light. Minor Galena also present.
Madan, in the Rhodope Mountains of Bulgaria, just north of the frontier with Greece, is an ancient ore-miners’ settlement. The history of mining in the Madan region extends back at least as far as the Thracians in the fifth century B.C. where the extraction of lead ore began.
Please note : Fluorescence is a phenomenon that causes a mineral to "glow" within the visible spectrum when exposed to ultraviolet light. Ultraviolet light is a form of electromagnetic radiation invisible to the human eye. The ultraviolet reaction is only visible with a special fluorescent torch / lamp with a filter that blocks white light but allows ultraviolet light to pass through. In order to achieve satisfactory results, do not use inexpensive 'UV' lights. Keep in mind that not only wattage, filtration but also distance from the UV torch to specimen are significant factors for best results.
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Негізгі бет Scalenohedral fluorescent Calcite crystal mineral specimen from the Madan field in Bulgaria.
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