Piece of the Week: A Gray Diamond Delight from Hemmerle
This 10.67-carat diamond, graded a natural fancy gray by two major labs, was part of Sotheby’s “Magnificent Jewels” sale last week.

One covered the sale of an emerald retrieved from the 1622 wreck of the Nuestra Señora de Atocha and made into a ring for Mitzi Perdue (of Perdue Farms fame), while the other delved into the fate of some of the sale’s top diamonds.
It was a crowded and, well, magnificent field, making it tough to stand out, unless you are a jewel from divine German design house Hemmerle.
Headed by fourth-generation jewelers Christian Hemmerle and wife Yasmin Hemmerle, the brand is considered one of the top contemporary labels among collectors.
A 19-piece, single-owner collection of Hemmerle jewels went up for auction last year at Sotheby’s and sold for a total of $1.4 million, nearly double its pre-sale estimate.
The Hemmerle piece highlighted here features a 10.67-carat emerald-cut gray diamond of SI1 clarity from an “important Detroit collection.”
Mounted in 18-karat gold, the diamond is graded “fancy gray, natural color” by both the Gemological Institute of America and Gübelin Gem Lab.
An anonymous buyer paid $1.1 million ($103,918 per carat) for the piece at Magnificent Jewels, below the pre-sale estimate of $1.5 million-$2 million.
We personally would have paid more, if we had the money.
The Latest

This year’s honorees include a Midwest retailer and two multi-store independents, one in New York and the other in New England.

As an homage to iconic crochet blankets, the necklace features the nostalgic motif through a kaleidoscope of cabochon-cut stones.

Discover the dozen up-and-coming brands exhibiting in the Design Atelier for the first time.

When investing in your jewelry business, it's important not to overlook the most crucial element of success: the sales associates.

The “Royal Ruby” Collection is a quintet of untreated rubies curated by collector Jack Abraham.


The entrepreneur and “Shark Tank” star will share his top tips for success.

Two existing executives have been given new roles.

More shoppers are walking out without buying. Here’s how smart jewelers can bring them back—and the tool they need to do it right.

Meredith Tiderington, an electrical engineering student, was selected for the award.

It will quit assigning the stones specific color and clarity grades in favor of applying “new descriptive terminology.”

From design trends to sustainability, here’s a roundup of can’t-miss education sessions at JCK Las Vegas.

The Jewelers’ Security Alliance offers advice for those attending the annual trade shows.

Her new role is director of strategic initiatives.

The designer is embracing bold pieces with weight to them in “AU79,” a collection she celebrated with a creative launch party.

On an earnings call, CEO J.K. Symancyk discussed what’s working for the company and how it’s preparing for the potential impact of tariffs.

The index partially rebounded after months of decline, due in part to the U.S.-China deal to temporarily reduce import tariffs.

The actress stars in the latest campaign set in Venice, Italy, and is set to participate in other creative initiatives for the jeweler.

The company has joined other labs, including GIA and Lotus Gemology, in adopting the Chinese term for "jadeite jade."

The large stone will be offered at its June sale along with a selection of secondary-type rubies from a new area of the Montepuez mine.

Located in Bangkok, the laboratory is Gemological Science International’s 14th location worldwide.

Those born in June have a myriad of options for their birthstone jewelry.

The diamond industry veteran has been named its senior sales executive.

The company plans to raise the prices of select watches to offset the impact of tariffs.

Between tariffs and the sky-high cost of gold, designers enter this year’s Las Vegas shows with a lot of questions and few answers.

Designed by founder Renato and his daughter Serena Cipullo, it showcases a flame motif representing unity and the power of gathering.

However, the tariffs remain in effect in the short term, as an appeals court has stayed the U.S. Court of International Trade’s decision.

The pop icon is one step closer to launching her “B Tiny” jewelry collection, a collection she first began posting about last fall.