VOLCANIC VERTEBRA (thunder eggs)

$ 35.00

In some unusual specimens the rhyolite has eroded away leaving the unusual formations of chalcedony in the early times were incorrectly thought to be fossil vertebra

These were often sought after by both the collector & also the lapridist one for the unusual formation and the latter for the hops of finding chatoiant colours in the chalcedony (they had to be cut very thinly with a good diamond blade)

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Description

These were often sought after by both the collector & also the lapridist one for the unusual formation and the latter for the hops of finding chatoyant colours in the chalcedony (they had to be cut very thinly with a good diamond blade)

In some unusual specimens the rhyolite has eroded away leaving the unusual formations of chalcedony in the early times were incorrectly thought to be fossil vertebra

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