Diamond Exchange Dallas has this 1.50 CTW Marquise Diamond Halo Engagement Ring available for $4500. This ring features a marquise diamond as the center stone and it is surrounded by a diamond halo. This ring is very unique. We only have 1 ring like this available so get it while it lasts. If you are interested in purchasing this engagement ring or would like to see this in person then please fill out our contact form to schedule an appointment or call us today at 214-755-1806. Diamond Exchange Dallas has a large selection of diamond rings and wholesale diamond jewelry.