2.6 carat Gold Diamond Engagement Ring

My ex fiance got drunk and smashed my iphone (along with other belongings, and worse..) and now I’m looking to trade this gorgeous round cut 2.6 carat diamond and gold engagement ring for an iPhone 16 or 17 pro max. meet at jewellers to confirm authenticity and safety, before trade off. Never rush into engagement.. see them mad before saying “I do” (it’s lab gown) I don’t have the certificate because it’s not safe for me to go get it. Perhaps in time I can provide it if that’s important to you.. It’s VG- but all details can be confirmed at jewellers