fluorite crystal

Colour-zoned fluorite crystal (17 x 12 mm), from Merthyr Tydfil. Fluorite is one of the earliest recorded minerals from Wales. Photo: M.P. Cooper.

Crisial o fflworsbar (17 mm x 12 mm) ac ynddo gylchfâu o liw, o Ferthyr Tudful. Fflworsbar yw un o'r mwynau cyntaf i'w gyfnodi yng Nghymru. Llun: M.P. Cooper.

For more information, see the Museums online crystal gallery

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