Gasgone blue maybe.

Sent from my iPhone

> On Jun 21, 2019, at 7:26 AM, Stephen Webb <stephen@newlifemarblerestoration.com> wrote:
>
> Greetings, can anyone make a positive id of this limestone? see attached
>
> Thank you
>
> Stephen
>
>
>
>
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> <20190613_151826.jpg>