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12 Acre field, Nancekuke Common, Porthtowan, Cornwall.
A shoad stone of quartz which is exceptionally rich in cryptocrystalline cassiterite, collected from a ploughed field near Factory Farm, situated between Portreath and Porthtowan.
A very large specimen, weighing several kilograms was recovered from the same locality at the turn of the 19th century and was donated to the County Museum in Truro.
A rare locality specimen, complete with the collector’s label
Size 7.5 x 6 x 5 cm
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