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[Joni3333]

I would be very grateful if someone could tell me something about age and where it can be from.

 

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[Mackaydon]

Silly me, I'd be more interesting in knowing if the stones were real diamonds; but perhaps you already know.
Don.....

 

[niffler]

The 750 mark usually means 18K gold. I don't have any idea on age though.