Prince Harry proposed to Meghan Markle with a custom engagement ring he designed for his bride-to-be. It features a trio of stunning diamonds. Interested in Royal Family? Add Royal Family as an interest to stay up to date on the latest Royal Family news, video, and analysis from ABC News. Royal Family Add Interest The ring’s center stone hails from Botswana, a country with personal significance for the couple, and is flanked by two diamonds from the personal collection of Harry’s mother, the late Princess Diana. “The little diamonds on either side are from my mother’s jewelry collection to make sure that she’s with us on this crazy journey together,” Harry told the BBC’s Mishal Husain today in their first interview as a couple. Markle, who called the ring “beautiful” and “incredible,” was touched by Harry’s design choices — especially the ring’s link to his mother. “I think everything about Harry’s thoughtfulness and the inclusion of [Diana’s stones] and, obviously, not being able to meet his mom —it’s so important to me to know that she’s a part of this with us,” Markle said. “It’s incredibly special to be able to have this, which sort of links where [Harry comes]…