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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  • $\begingroup$ 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. $\endgroup$ – user824 Feb 8 '19 at 17:42

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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