Christie’s ‘Summer Sparkle’ Brings the Heat with 24-Carat Heart Diamond
Expected to sell for $1.6 million-$2.6 million, it’s the highest valued jewel ever offered in an online-only auction at Christie’s.

“Jewels Online: Summer Sparkle,” held now through Aug. 18, features a wide variety of colorless and fancy color diamonds, including pink, orange, green, brown, and yellow, some of which are being offered without reserve.
The highlight of the sale is a 24.45-carat D color, internally flawless, Type IIa heart-shaped diamond pendant that’s estimated to sell for between $1.6 million and $2.6 million, making it the highest valued jewel ever offered in an online-only auction at Christie’s.
Last year, a 28.86-carat D-color, emerald-cut, VVS1 Type IIa diamond set the record, garnering $2.1 million at Christie’s Jewels Online sale in June.
Its sale comes at a time when colorless diamonds have been topping expectations at auction.
See: Highlights from Christie’s “Summer Sparkle” Online Auction
Meanwhile, another expected top lot of the auction is “The Summer Sunrise,” a ring centered on a 9.83-carat VS1 fancy vivid orange-yellow diamond ($600,000-$800,000).
There is also a 6.29-carat D color internally flawless oval diamond ring estimated between $250,000 and $350,000, a 10.08-carat diamond emerald-cut diamond ring with tapered baguette-cut diamond accents that could garner $200,000-$300,000, and pear diamond earrings weighing 10.02 carats that could go in the range of $200,000-$300,000.
To see all the lots in “Summer Sparkle,” visit Christies.com. Bids close on Aug. 18 at 10 a.m. EDT.
The Latest

He retired last month after 28 years traveling the world to source the very best gemstones for his family’s jewelry business, Oscar Heyman.

The charm necklace features six nautical charms of shells and coral that founder Christina Puchi collected on Florida’s beaches.

The organization elected its youngest vice president as it looks to draw in fresh talent.

The Seymour & Evelyn Holtzman Bench Scholarship from Jewelers of America returns for a second year.

Campbell joins the company as vice president of business development while Liebler is the new vice president of operations.


The medals feature a split-texture design highlighting the Games’ first time being hosted by two cities and the athletes’ journeys.

Sponsored by The INSTORE Jewelry Show 2025

The countdown is on for the JCK Las Vegas Show and JA is pulling out all the stops.

Globally, travel and transportation brands reigned, while in the U.S., alcoholic beverage companies and a lingerie brand took the top spots.

The Brooklyn-based jewelry designer is remembered as a true artist and a rare talent.

Production at the mine in Canada’s Northwest Territories topped 1 million carats in Q2, the third consecutive quarter of growth.

A new slate of Learning Workshops will take place in Oklahoma, Mississippi, and Georgia.

The middle class is changing its approach to buying jewelry and affordable luxury goods, the NRF said.

It marks the third consecutive quarter of growth for Cartier, Van Cleef & Arpels, Buccellati, and Vhernier.

The reseller’s market trends report, based on its sales data, also shows exactly how much Rolex prices have jumped since 2010.

Jake Duneier and Danielle Duneier-Goldberg have stepped into the roles of CEO and president, respectively.

The “Impermanence” collection contemplates nature through the Japanese art of Ikebana (flower arranging) and philosophy of wabi-sabi.

The Texas-based jewelry retailer has set up shop in Tennessee and Arizona.

Eric Ford will step into the role, bringing with him decades of experience.

In addition to improved capabilities, the acquisition will allow the jeweler to offer support to other independent jewelers.

The “Celestial Blue” capsule collection campaign features Olympian Kateryna Sadurska.

The seasonal store, located in Mykonos, Greece, offers exclusive events, personal styling, and curated experiences.

The New England jeweler is hosting a bridal event for the month of August.

The trade-only event will host its debut fair in the Emerald City later this month.

Its sessions will focus on inventory strategies, staff performance, retention and acquisition, emerging market trends, and more.

For its 10th anniversary, Miseno designed the “Arco” earrings based on the Arco Felice, an arch conceptualized in A.D. 95 in Miseno, Italy.

The jewelry company is one of several contributing to relief efforts in the region after the recent floods.