Agatized Florida Coral

Sorry rockjunquie I did not see this.
Great write up on the Fl/Ga coral.
Ha, the coral does get around. What a great collecting target for those living close to Ga/Fl.
The old timer rock collector neighbor I had(he has since passed)used to carry coral out to western rock shows and had no problem selling it. The botryoidal hollows are world class pseudomorphs no doubt.

He was fortunate to be able to pick up tons of the unique pseudomorphs along Tampa Beaches before they were picked clean.
They have been picked dry for decades until strong hurricanes hit and expose a few more.
Tampa has dodged the really strong storms fortunately but if one ever does strike there it will be a collectors paradise.
There is a layer of them about a foot thick under 1 to 20 feet of beach sand as far as the eye can see down there.
That includes the entire bottom of the massive Tampa Bay.

The larger ones are not so colorful and found in the Withlacoochee River along the Fl/Ga border. The one in your photo looks like a Georgia find. They can over 18 inches in diameter there. Hard to bring home and requires a BIG saw.

Sample like this one are interesting in that the 'needles' have been broken off and came to rest in the bottom of the cavity only to be well silicified back in place where they landed. Perhaps tectonic events shook/broke them loose. Or they fell from the high river banks rather recently and were broken loose from the impact suggesting rapid silicification. No time stamp is there to prove such...