Courtesy Bonhams

Bonhams has announced that its autumn Fine Jewellery Sale will take place Sept. 17 at the auction house’s new headquarters on London’s Bond Street.

The most valuable piece of the sale is a diamond riviére necklace made of 40 brilliant-cut diamonds weighing 76 cts. in total. It is estimated at £250,000–£400,000 ($412,380–$660,250).

The second most valuable is a single-strand natural saltwater pearl necklace dating from about 1910. The necklace, which has 75 pearls, is estimated at £150,000–£200,000 ($247,593–$330,135).

The showcase of the sale, however, is a pair of diamond jewels being sold together: a diamond and green peridot frog, which was a gift from the Duke of Windsor to Wallis Simpson in 1937, and a diamond brooch designed in the late 1800s based on the Prince of Wales’ feathers, the badge of the Prince of Wales.

The pair is estimated at £5,000–£10,000 ($8,253–$16,506). The current owner purchased them both at the Jewels of the Duchess of Windsor sale at Sotheby’s in Geneva in 1987. The brooch was converted to a bar brooch after that sale. 

JCK