Chalcedony stalactitesSpeleothems, another name for cave features such as pearls and bacon are usual
Chalcedony stalactitesSpeleothems, another name for cave features such as pearls and bacon are usually made of precipitated calcium carbonate, but sometimes in warmer deeper conditions in the Earth, they form out of silica as illustrated by the lovely 5cm grouping in this photo.LozImage credit: Howie516 -- source link
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