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Thunder Egg

In Oregon, the major source of Thunder Eggs, it is often claimed that the name comes from the native Indians' belief that they were thrown by the gods during storms - but this story was apparently invented to promote sales!

Thunder Eggs actually form in tennis-ball-sized pockets in volcanic rhyolites.

The centre is generally filled with variants of chalcedony - agate, jasper or opal - and, as here, quartz and selenite are often also present.

£39.60 - £233.28

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