Christie’s “Magnificent Jewels” sale during Autumn Luxury Week in Geneva will include a storied “Fancy Intense Pink” diamond ring made by Bulgari in the 1950s. The estimate for the lot, to be auctioned off on November 10, is $12 million–$18 million.

According to a press release, the 24-karat diamond was acquired in India by the current owner’s great-grandfather and given to Bulgari to be set into a piece of jewelry around the time that Rome, the house’s base since its founding in the 19th century, was a center of postwar glamour. The “distinguished European noble family” that commissioned the ring held onto the ring for more than 70 years, per the release.