Diamond Engagement Ring 14kt Two Tone Gold. A gorgeous Tiffany style diamond ring in 14kt two-tone gold. This ring is set with one round brilliant cut diamond weighing (0.49ct). Clarity is I1 and appears to be G in color with a faint blue flourescence. The size 7 1/2 ring is hallmarked: JTC; 969; 14kt and is in very good condition. Included is an insurance appraisal of $1726.00.