See the highlights throughout history and the pieces that channel the look
THE BEST ADDRESS
Discover where the top stones come from
with expert Frank Everett, Senior Vice President, Sotheby’s Jewelry
“Stones are attached to their country of origin much the way real estate is valued by its address. You can have a sapphire that’s pretty but not amazing and if it's Kashmir and it’s unheated, its value goes through the roof.”
DIAMONDS: THE RARITY SCALE
White might be eternally classic, but colored diamonds often fetch higher prices. A few years ago it was all about pinks,
while today it’s blue diamonds that are the most in-demand. The rarest? Green and red—so rare that few know they even exist.
The world’s most expensive diamond (price-per-carat) is The Blue Moon of Josephine, an Internally Flawless Fancy Vivid Blue cushion diamond, weighing 12.03 carats. It was sold by Sotheby’s for $48.4 million in November 2015.
THE 4 C's
Diamonds are graded and assigned value based on the principals below. The four Cs also apply to colored stones,
though country of origin and heating treatment (used for hundreds of years to unify color) is also noted.