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A scenic cabochon of Cotham Marble, a stromatolitic limestone from Bristol, UK.

Stromatolites were some of the earliest life forms on the planet, the deposits from this area dating back to the Triassic period, around 225 million years ago.

The cabochon displays Cotham marbles characteristic landscape pattern, muted colours and dendritic forms.

weight:  48.75carats
shape:   Oval cabochon
dimensions:   39.99 x 29.98 x 5.28 mm
treatment:  None