These Simon G. rings are available in either 18k gold or platinum. Pictured here together, either the semi-mount (LP1355) or the band (LP1712) are available by themselves. Also available in two-tone yellow/white gold. Total diamond weights areo.07 carats (semi) and 0.16 carats (band). We are a certified Antwerp Diamond Importer and would be happy to provide you with options for the center stone. In most cases, Simon G. rings must be made to order. Please allow 4-6 weeks.