Multi Gemstone Ring in 18k with Diamonds – Opal and Pearl Jewellery store in Sydney- Cosmopolitan Jewellers In the event that you truly value diamond stones, search for studs that consolidate at least two stones. For something straightforward, think about a couple of botanical filigree studs with both Blue Topaz and Peridot, set in real silver and a middle circle of 18 karat gold. They are only under 2 inches long.