B Brink211 Rough_Rock Joined Nov 2, 2020 Messages 2 Nov 2, 2020 #1 Only stamp is 925 I just looked quick.
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Karl_K Super_Ideal_Rock Staff member Trade Joined Aug 4, 2008 Messages 15,788 Nov 2, 2020 #2 synthetic sapphire mounted in sterling silver is my guess. Other stones probably not diamonds.