I see these rings every one in a while from poulticing applications-in most cases a high alkaline cleaner will do the trick.
In some cases we have had to put diamonds but only as a last resort-

2016-05-11 23:17 GMT-04:00 Justin Cameron <justin@jmcstoneandtilecare.com>:

Sent from my iPhone

> On May 11, 2016, at 8:16 PM, Justin Cameron <justin@jmcstoneandtilecare.com> wrote:
>
> Had a client email me pics of her granite.  She used a poultice from Dupont Stonetech stain removal. This is what it looks like, why did it do this ? and how can it be fixed.
> Thank you
> Justin
>
> Sent from my iPhone

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Regards,
Stu Rosen
201-446-1200

"EVERYTHING MATTERS"