sustainable jewelry. Glowing like sunlight made solid, this 13-15mm golden South Sea pearl necklace is a statement piece ... [+] with an 18-karat gold clasp. Instantly identifiable yet relatively ...

In 1969, the sea stone was sold at Sotheby's ... This makes it the most expensive pearl necklace sold at auction. Sold by ...

The exquisite diamond and South Sea pearl necklace was crafted by Garrard, the crown jeweller at the time. Interestingly, the design of the necklace incorporated input from Diana herself.

A single South Sea pearl can cost $1,500, and a necklace can reach over $200,000. So, how are these pearls grown? And what makes them so expensive? More from Retail South Sea pearls are the ...