12ct. Sapphire Ring to Lead Sotheby’s Hong Kong

September 7, 2025
Suzanne Watkin

A 12.56-carat sapphire will go under the hammer at an upcoming Sotheby’s auction in Hong Kong, where it is expected to fetch up HKD 20 million ($2.6 million).

The ring, bearing a cushion-shaped Kashmir sapphire between two trapeze-shaped diamonds, will headline the September 19 High Jewelry sale, according to the auction house’s website. The 202-lot sale will showcase a variety of colored stones, including rubies, jadeites and emeralds.

In addition, the auction will feature jewelry from designers such as Cartier, Hermès and Chaumet.

Here are the rest of the top 10 lots:

An oval jadeite cabochon ring of bright-green color, accented by two heart-shaped and brilliant-cut diamonds at Sotheby's image — An oval jadeite cabochon ring of bright-green color, accented by two heart-shaped and brilliant-cut diamonds, has a top estimate of HKD 12 million ($1.5 million).

This necklace containing 39 translucent jadeite beads connected by a calibré-cut ruby, baguette and brilliant-cut diamond clasp at Sotheby's image — This necklace containing 39 translucent jadeite beads connected by a calibré-cut ruby, baguette and brilliant-cut diamond clasp carries a high price of HKD 12 million ($1.5 million).

A ring with a cut-cornered, mixed-cut, fancy-pink diamond, flanked by two half-moon shaped diamonds at Sotheby's image — A ring with a cut-cornered, mixed-cut, 5.07-carat, fancy-pink, VS1-clarity diamond, flanked by two half-moon shaped diamonds, is expected to fetch as much as HKD 11.8 million ($1.5 million).

A ring featuring a cushion-shaped, 10.02-carat Colombian emerald between two triangular diamonds at Sotheby's image — Sotheby’s is offering this ring featuring a cushion-shaped, 10.02-carat Colombian emerald between two triangular diamonds for up to HKD 8.5 million ($1.1 million).

This necklace comprising 21 oval and cushion-shaped Burmese rubies with alternating old mine- and brilliant-cut diamonds at Sotheby's image — This necklace comprising 21 oval and cushion-shaped Burmese rubies weighing a total of 61.91 carats, with alternating old mine- and brilliant-cut diamonds, has an upper presale price of HKD 8 million ($1 million).

A ring containing an oval jadeite cabochon stone at Sotheby's image — A ring containing an oval jadeite cabochon stone is expected to garner up to HKD 8 million ($1 million).

This necklace comprises 39 graduated intense-green jadeite beads, connected by a boule clasp featuring brilliant-cut diamonds at Sotheby's image — This necklace comprises 39 graduated intense-green jadeite beads, connected by a boule clasp featuring brilliant-cut diamonds. It has an upper estimate of HKD 8 million ($1 million).

A jadeite necklace featuring 73 graduated highly translucent vivid-green beads, with a clasp boasting calibré-cut rubies and diamonds at Sotheby's image — A jadeite necklace featuring 73 graduated highly translucent vivid-green beads, with a clasp boasting calibré-cut rubies and diamonds, is set to make up to HKD 6.5 million ($833,741).

This piece is designed as a necklace that can convert to a tiara. It features a fringe of oval and cushion-cut Burmese rubies, surrounded by old European- and brilliant-cut diamond drops, all connected by trios of baguette diamonds at Sotheby's image — This piece is designed as a necklace that can convert to a tiara. It features a fringe of oval and cushion-cut Burmese rubies, surrounded by old European- and brilliant-cut diamond drops, all connected by trios of baguette diamonds. It has a high price of HKD 6 million ($769,607)

Image: The 12.56-carat sapphire and diamond ring. (Sotheby’s)

Don't Miss the Latest Industry News

Click Now to Make Rapaport a Preferred Google Source

<img alt="Google__G__logo" height="24" style="height: auto; max-width: 100%; width: 24px; float: left; margin-left: 0px; margin-right: 10px;" src="https://464503.fs1.hubspotusercontent-na1.net/hubfs/464503/Google__G__logo.svg" width="24" loading="lazy">Add Rapaport

12ct. Sapphire Ring to Lead Sotheby’s Hong Kong

Suzanne Watkin

news@rapaport.com

Auction

More Stories

Top Stories from Rapaport

Webinar: What Millions of Diamonds Taught Us

Session will take place June 16 at 10 a.m. Eastern time.

Ring from the Desert Diamonds collection by De Beers image

Natural-Diamond Spending and Sizes Rising, De Beers Says

Average cost of mined stone was $4,063 in 2025, up 25% from 2023.

Some of the imperial jewels that will be offered at the sale at Sotheby's image

Imperial Russian Jewels to Lead Sotheby’s Inaugural Artistic Luxury Auction

A Fabergé diamond and aquamarine necklace from 1911 could fetch up to $600,000 in New York.

Featured

rough diamonds image

Angola to Reduce Supply of Small Diamonds

Next Catoca and Luele sales will see lower availability in those sizes, Endiama says.