Here is a Fine Simon G White Gold Diamond Mounting. Made from Solid White Gold and weighs 2.8 grams. It holds .24Ct of Natural Round Brilliant Diamonds that are G Color VS Clarity. At the center you can fit diamond that is 5mm Square. Hallmarked Simon G, 18Kt, 328410. Across the center top it is 5.4mm wide and the shank tapers down to 1.8mm. Excellent Condition Ring