Trilogy-style ring (with three stones)

I want to give my fiancée an engagement ring where three stones symbolize our past, present, and future. My brother in San Francisco sent me photos of some new local designs featuring an elongated diamond in the center and two round ones on either side. He says that in the U.S., this “marquise diamond engagement ring” https://elgrissydiamonds.com/collections/marquise-diamond-rings style is currently breaking all popularity records because of its deep meaning. Has anyone ordered something like this online from the U.S.? Does the combination of different cuts in a single piece look harmonious?