Ring stamp meaning? The inside is stamped with a diamond shape and the letters "STR" (2nd image). I assume STR means this is a sterling silver ring, but am curious what the
White Gold Yellow Sapphire & Diamond Ring, Size N, Full Hallmarks, Excellent Con | eBay
Hallmark | Fiona Diamonds
Elmwoods Auctions | HENNELL, A DIAMOND RING in 18ct yellow gold, the o
F in a Diamond
Contemporary 9ct White Gold Diamond Ring Size N or 6 3/4 USA.
Metal Hallmarking Guide | Taylor & Hart
Do You Know Your Hallmarks? | Blog | Baker Brothers Diamonds
Hallmarking And Your Jewellery: Top Ten Tips – All Diamond