This 6 Ct. Pink Diamond Could Fetch $1.8 Million in December Sale

By Annie Davidson Watson | November 11, 2025

As Dallas-based Heritage Auctions gears up for its annual Holiday Fine Jewelry Signature Auction on Dec. 3, one jewel in particular is making headlines: a 6.17 ct. fancy pink diamond known as the Angelina, estimated at $1.2 million to $1.8 million.

The newly surfaced oval-cut gem—set in a ring of 18k white and rose gold with approximately 1 ct. t.w. full-cut near colorless diamonds encircling the center stone and along the band—comes from the estate of Willa Dean Lyon (1931–2024), a Texas native and Orange County, Calif., philanthropist whose jewelry collection also included notable pieces by David Webb.

Named for Lyon’s granddaughter, the Angelina pairs significant provenance with extraordinary rarity. Less than 0.01% of all mined diamonds display natural pink coloration, and those exceeding 5 carats with deep saturation are among the most coveted stones in existence.

Heritage pink diamond ring — *The Angelina pink diamond set in a diamond-embellished ring.*

“Stones of this caliber are seldom seen at auction, and demand has only grown stronger,” said Jill Burgum, Heritage’s executive director of fine jewelry, in a statement. “Extraordinarily rare, fancy pink diamonds over 5 carats with remarkable clarity remain the ultimate prize for discerning collectors, sought after now more than ever.”

Formed through a rare distortion in crystal structure, natural pink diamonds bend light in ways that create their distinctive blush. Few survive intact.

According to the Fancy Color Research Foundation, pink diamonds have appreciated by more than 115% over the past decade—outpacing all other fancy color categories—as global supply tightens. The 2020 closure of Australia’s Argyle mine, once responsible for up to 90% of the world’s pink diamonds, has only intensified demand.

Prior to the auction, the Angelina will be exhibited at Heritage’s galleries in Beverly Hills (Nov. 12–15), New York (Nov. 19–22), and Chicago (Dec. 1 and 2).

(Photos courtesy of Heritage Auctions)

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