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Pauline Barnden - Small Shell Dimensions: 15cm (6in) long approx Material: Porcelain Firing Temperature: 1200 deg. c Glaze: Barium based

Ammonite, opalised, 254nm fluorescence, photograph by The Bob. - A.lain R. T.ruong

fossil ammonites - It's like the greatest natural fractal ever, or steampunk rock.