THIS RING HAS A WEAK 18K MARK SO I TESTED IT WITH NITRIC ACID AND A "KEE" TESTER. IT IS 18K SOLID WHITE GOLD AND WEIGHS 4.0 GRAMS. SET AT THE TOP IN A CUSTOM MADE HEAD IS A .10 CT ROUND BRILLIANT CUT NATURAL DIAMOND. THE RING WEARS TO A SIZE 7 AND CAN BE RESIZED BY YOUR LOCAL JEWELER. AS WITH MOST OF MY AUCTIONS, I LIKE TO START THEM AT .99 CENTS.