If you are in the market for cushion cut diamonds you may not know that this cut of diamond has been very popular for the last hundred years or so. This cut tends to let the vibrant light of a diamond really show through. The cut itself is designed to resemble an overstuffed cushion that also has a bit larger facets to gather and project such beautiful light. However, this cut of diamond actually gets its name from the edges that appear to have a bit of a softer curve to them. For engagements to promise rings, cushion cut diamonds have become synonymous with the modern day engagement ring.