Diamond Engagement Ring. This 18 karat white gold engagement ring features a 1/2 carat diamond center. Diamond is H color and SI2 clarity. To assure highest quality, each piece is made to order. This is a custom made ring just for you or your loved one. Since it is made to order, we can make it any size you like from size 5 to size 10. There will be additional costs for sizes greater than size 10, due to the extra gold that will be required. Want a better quality Diamond? We can do it, just ask us for a quote.