Brides love to know more about the jewelry taste of their favorite celebrities. It is true that the price of most celebrity diamond rings will be huge. However, you can still emulate the design and style of celebrity diamond rings and incorporate those tiny details into your custom diamond engagement ring.   The Most Expensive Celebrity Diamond Rings The Neil Lane blue diamond engagement ring worn by the famous actress Jennifer Lopez is considered as one of the most expensive diamond engagement rings ever. The stunning 8.5-carat diamond engagement ring was gifted to the actress by the salsa singer Marc Anthony at their wedding ceremony. The Lorraine Schwartz platinum diamond engagement ring that Jay-Z gifted to his longtime girlfriend Beyonce is also a highly expensive ring. The 18-carat cut diamond ring is exceptionally flawless, which is why the cost of the stunning diamond ring is estimated to be approximately 5 million dollars.