Geometric Diamond & Sapphire Engagement Ring in White GoldGeometric Diamond Sapphire Engagement Ring in White Gold. There are many fascinating design elements in this diamond and sapphire engagement ring set in 18 karat white gold. At a glance the center stone appears to be an emerald cut diamond, but when you look closer it is actually a very skillfully grouped cluster of baguette and round cut diamonds. The center stones are then surrounded by a floating halo of channel set sapphires with four (4) round