Circle with a dot?

[fiatboy]

I found a bunch of rings and have been able to identify all of them except one. It's gold colored, and the only marker/hallmark it has is a circle with a dot inside it. Anyone know what this is?

 

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a picture would help

 

[Tricia]

Target...as in Target store. ?

Yup, picture would help.

 

[fiatboy]

It's from a jeweler in Toronto I just found out. Thanks for looking.