Large Oval Ruby Diamond Halo Ring Platinum.  This marvelous modern cocktail ring features a striking 6 carat ruby which is prong set and surrounded by 2.28 carats of diamonds. Finished in platinum, this fine cocktail ring has an interesting diamond halo with two (2) .29 carat trapezoid cut diamonds and ten (10) that are Round Brilliant Cut. The diamonds add plenty of sparkle to the fabulous red of this luxurious ruby.