RAPAPORT... A yellow diamond ring that once belonged to the royal familyof Hawaii sold for $519,500 at auction Sunday. The old-mine-cut, 34.28-carat, fancy-light-yellow,VS2-clarity diamond ring, set in platinum and white gold, was the lead item atthe Clars Auction Gallery sale in Oakland, California. It realized $15,155 percarat, according to Rapaport calculations. The piece - with a high presale estimate of $600,000 - wasoriginally bought by Hawaiian King Kalakaua for his wife, Queen Kapiolani, towear to Queen Victoria's Jubilee celebrations in England in 1887. In late 1890,the king traveled to San Francisco, where he used the ring as collateral for agambling loan from Crocker Bank. Kalakaua died during the trip, having never returned for thering. Crocker Bank sold it to a Texas gem dealer at the turn of the century. In1950, Frank Spenger, owner of the famous Spenger's Fresh Fish Grotto inCalifornia, purchased the ring, which he displayed in a special case at therestaurant's Diamond Bar until October 2018, when it closed after 128 years in business. The yellow diamond was sold as part of the SpengerCollection auction, along with other items, including fine art, furniture andhistorical items. Image: The 34.28-carat yellow-diamond ring (top); King Kalakaua of Hawaii (right). (Clars Auction Gallery)