Round Cut Halo Diamond Engagement Ring. Contemporary Halo diamond ring set with the Round Brilliant center diamond. Baguette and Round on both sides of the shoulders of the ring, are great at accenting the beauty, shine and brilliancy of the center diamond 1.00 carat as shown . At PureDiamond.ca we have unparalleled friendly service. If you're in the Greater Vancouver area please call (604) 563-9875 to book an appointment.