Webbstar1, welcome to TreasureNet.
Although the What-Is-It forum tends to be a more "serious-minded" place than other T-Net forums, it does have its jokester contingent... which is having some good-natured fun with your rock. I'll offer you a more scholarly-toned answer about it.
You asked for "thoughts," without specifying what you want to know. Are you enquiring about what it is made of, or, what it might have been used for?
Well-focused super-closeup photos are needed to identify the mineral(s) it is made of. In your current photos, it looks to me like Quartzite, which is a Metamorphic type of stone composed of pressure-compressed quartz sandstone.
As to what your rock might have been used for... it appears to have been shaped entirely by Mother Nature, not by man. Its corners have been worn smooth by natural forces. Parts of its surface are darker than others, which on some types of stone indicates some areas of its surface have been broken off more recently than the rest of its surface.
The following is based on my photo-based guess that your rock is Quartzite, which is a Metamorphic variety of stone:
You say it was found in Florida. The "native" rocks in that state are the Sedimentary kind (not Metamorphic, nor Igneous). So, your rock must have been transported to Florida by humans from an out-of-state location where Metamorphic rocks are the primary geological type.