A three stone Blue Topaz and Diamond ringA 9 carat white gold three stone ring. This ring is from our Heirloom Collection. This is when we take a stone from a pre owned ring that is worn out, and reset it into a brand new setting. Here we have taken an emerald cut blue topaz, 7x5mm, a lovely crystal clear gemstone, and married it to a brilliant cut white diamond each side, each 2. 8mm (0. 08 carats) H i colour, Si clarity. Head measures 10. 5x7. 6mm, depth 4mm, weight 1. 9grams. UK