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Round with crystal looking around it, hard. Seems to have layers in the center.

The inside is smooth and the outside layer is textured. The white layers go all the way through the rock. Found on the beach in Florida.

I’m thinking it could have broken off a bigger piece?
Would like to know if it is valuable.

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closed as off-topic by Jan Doggen, Leukocyte, Gimelist, Peter Jansson, Fred Aug 26 at 17:35

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions about rock identification requests are off-topic. For more information, see the announcement on meta." – Jan Doggen, Leukocyte, Gimelist, Peter Jansson, Fred
If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ Looks like an agate but without a hardness it could also be the cross section of a stalagmite or stalactite. The crystallized outer section suggests an agate to me, the symmetry made me think of cave formation cross sections I have seen. Stalagmite or stalactite will have a hardness <= 3, agate 6 to 7. $\endgroup$ – Friddy Feb 8 at 17:42
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Your rock appears to quartz stalactite with druzy quartz crystals coating a banded chalcedony. A nice little find but is probably not really worth much. Label it and put in a perky box, the specimen might fetch $1-2 US dollars. Quartz stalactite images.

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