Cowdray Pearl

The Cowdray Pearl Necklace is well-known for its high price, as well as its history and rarity. Grey pearls are extremely rare, with only one in 100,000 being found. This necklace, which is made up of 38 graded natural grey pearls, is well worth the nearly $3.3 million price tag. The late Lady Pearson, who subsequently became Viscountess Cowdray, was the original owner of this grey pearl necklace.

The beads in this 43.2-centimeter necklace range in size from 11.4 to 6.8 millimeters in diameter. The clasp on this necklace is a stunning rectangular mixed-cut diamond that surely provided a lot of brilliance and brightness to the pearl necklace. The luster, shape, and size of the pearls are all perfectly matched in this piece. This piece was auctioned for $3 million in 2012 by Christie's, demonstrating that its value has improved in the last three years.

Price: $3.3 million