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Ships within 48 hours · Estimated delivery Aug 18 - Aug 23
height 12cm
Circa 410 million years old
Lightly polished
Dating from the Late Cretaceous
With its distinctive zig-zag shell edge
Bismuth crystals ammonete height 12cmBismuth is a semi metal element used in all manner of industrial and pharmaceutical products. This bismuth has been found in its non crystallised, grey silver form, heated until molten and then cooled to naturally allow the bismuth to form into its characteristic cubic crystals. The iridescent rainbow colour is a result of oxidisation as the stair step crystals cool. These mind blowing crystals are made in the UK. Length: 5cm Height 5cm Depth 5cm
