Channel Set Princess Cut Diamond Engagement Ring in Platinum (1/4 ct. tw.) - Distinctly beautiful, this diamond engagement ring showcases twelve princess-cut diamonds that are set in a platinum channel design to accent your center diamond. (1/4) carat total diamond weight. Price is for setting only.Channel Set Princess Cut Diamond Engagement Ring in Platinum (1/4 ct. tw.) - Distinctly beautiful, this diamond engagement ring showcases twelve princess-cut diamonds that are set in a platinum channel design to accent your center diamond. (1/4) carat total diamond weight. Price is for setting only.