Is this a stone marble

[MDING TOM]

I know nothing about collecting marbles but found this while digging up the yard for our graden. is this a marble or just a weird stone.

[duffytrash]

prob a marble...depends on where youre at on what kind..could be stoneware or clay or minereral the pic is kinda hard to tell...vinegar reacts to limestone...

[MDING TOM]

we are from the upper pen. of michigan near the bay. i will have to try the vinegar n see n ill try to get a better pic of it. thanks for the reply.

[Marbleguy]

I mean a REALLY strong light source. Subject it to a UV light source. It could be a glass marble that was exposed to wind borne sand blasting.