What makes cushion halo rings different from solitaire rings?

Cushion halo rings have small diamonds around the center stone, while solitaire rings feature a single diamond without any surrounding stones. The halo gives more sparkle and visual size.
More info: https://www.antiquecut.com/pro....ducts/cushion-halo-e

Does a ring on the right ring finger mean someone is married?

Not always. In some countries, wedding rings are worn on the right hand, but in many places, a ring on the right ring finger may simply be a personal or style choice.
More info: https://www.antiquecut.com/blo....gs/education/ring-on

Are lab-grown diamonds suitable for vintage engagement rings?

Yes, lab-grown diamonds can work well in vintage-style engagement rings. The design comes from the setting, so a lab-grown diamond can still give the ring a vintage look when paired with the right details.
More info: https://www.antiquecut.com/blo....gs/engagement-rings/