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Chalcedony

Chalcedony

Boytroidal Chalcedony. Botryoidal (grape-like) structures manifest internally as "turtle-backing" or sometimes externally as "bubble-top" surfaces.

Boytroidal Chalcedony. Botryoidal (grape-like) structures manifest internally as "turtle-backing" or sometimes externally as "bubble-top" surfaces.

~Unusually perfect specimen of chrysanthemum rock. This close-up shows the 1 1/2 pound stone with a flower-like pattern that is is made of celestite and calcium deposits on black limestone.~

~Unusually perfect specimen of chrysanthemum rock. This close-up shows the 1 1/2 pound stone with a flower-like pattern that is is made of celestite and calcium deposits on black limestone.~

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