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Ultraviolet fluorescence of stalagmite close-up.
Photo size: 12.1 Mpixels (34.7 MB uncompressed) - 2848x4256 pixels (9.5x14.2 in / 24.1x36 cm at 300 ppi)
Photo keywords: blacklight ultraviolet, f stalagmite, fluorescence, fluorescence blacklight ultraviolet