A Perfect Sphere of Flint

[Brad1978]

Found this on my morning hike up the Frio River bed and it looks to be solid flint but something tells me there might be something interesting inside of it.  I’m not real knowledgable on what geodes look like but it’s about the size of a large canteloupe and fairly heavy.  Has a layer of petina forming around it.  

[NWGeoFan]

Could be a solid piece of agate. Either way you will have to crack it open if you want to know for sure.If you have a hammer and chisel or a table saw capable of cutting stone I would say just go for it.

[FossilDudeCO]

if you decide to cut it be sure to share what you find!

[ynot]

Quartzites (chert agate flint) are hard rocks and will tumble for long distance and be severely rounded in the process.

If it were hollow it would most likely not survive the trip.

If You want to see what the insides look like I would suggest cutting rather than breaking it.

[Brad1978]

I’ll see if I can find somebody with a diamond blade big enough to cut it. I’ll certainly share photos once it’s done.

[NWGeoFan]

Good luck! If not you cant get a hold of a saw you can try wetting it and freezing it to see if theres any good cracks to take advantage of (though it appears to be too dense for this strategy).  Hopefully it turns out nicely 

[ynot]

If You want to go stone age on it, I have heard of an unusual method.

Heat the stone in a hot fire and then hit it with a line of cold water.(like when You shake water out of a paint brush.)

Freeze - thaw method will do nothing.

[caldigger]

17 minutes ago, ynot said:

If You want to go stone age on it, I have heard of a unusual method.

Heat the stone in a hot fire and then hit it with a line of cold water.(like when You shake water out of a paint brush.)

Freeze - thaw method will do nothing.

The OSHA in me suggests you wear eye protection if you are going to do this!

[Macrophyseter]

Good luck if youre gonna try to cut it!