I should add it fits perfectly in the hand with a distinct pointer finger print. Maybe a lb. or so. That is my wife's hand holding it but it actually fits better in my hand (bigger). thanks
Groundstone” artifacts were used for several thousand years, so in general they are fairly common; that one is kind of unusual though. My guess is they took advantage of a void left by a natural inclusion (producing the really distinct cup shape) and it was subsequently shaped by frequent use. It may have been multi-functional—it very well could have been used for dressing antler billets along with a mortar/pestle-type function (grinding ochre and whatnot for paint, grinding herbs for medicine, etc.). Mortars and pestles (some of which are impressed directly into exposed bedrock for grinding acorns and/or xerophytic plants) have been found in central Texas archeological sites, although more slab-like metates with manos tend to occur more frequently. In this area, I doubt if it would have been a fire stone.
The coating on the inside of the cup and the crystalline rock composition around the basin looks like quartz. I'm thinking a repurposed geode into a paint pot or grinding basin. Perhaps a special grinder for medicinals?
Reanm8er, just found it in a field that had just been plowed while dove hunting Sunday. I am going back when the weather clears to search further. I'll post if I find anything else.
Does look like a modified vug ... very nice pattern of human alteration.
That's a nice piece, Ticker.
I'd really like to know if it's flint ... can you make out the type of stone ?
PnP, It seems to have some characteristics of flint but I don't think it is. It has a broken piece on the underside that I will take a pic and post tomorrow. That may show folks that are more knowledgeable about the type of stone.