Sánchez’s pink diamond only adds momentum to the colored diamond trend. “I think Lauren’s ring is inline with a rising interest in rare, unique, and colored diamonds,” Mazuera says.

"It is a fancy purple-pink diamond from the 18th century and most likely from the Golconda mines in India," Kadakia told The Associated Press. It is estimated to sell for $3 million to $5 million ...

The rare 10-carat diamond is set in a ring designed by jeweler Joel Arthur Rosenthal. It will be a part of the "Magnificent Jewels" live auction at Christie's Rockefeller Center location on June 17.

The heirloom in question, lot 44, which sold for $13.98 million, is a diamond and blackened platinum ring featuring a fancy kite-shaped 10.38-carat purple-pink diamond.

Christie’s New York sold the Marie-Thérèse Pink, a 10.38-carat diamond set in a ring by Joel Arthur Rosenthal, the Parisian jewelry maker known as JAR, for $14 million in June.

Lauren Sánchez didn’t wear her pink diamond engagement ring down the aisle, but she did put it on display in her wedding photo shoot. Here are all the details.