Model Georgina Rodríguez received a rock of an engagement ring, with her diamond estimated to be 35 carats, experts say.
Joanna Hardy Completes Gemstone Trilogy with ‘Sapphire’ Book
It’s the follow-up to “Emerald” and “Ruby.”

Published by Thames & Hudson, in association with Violette Editions in partnership with Gemfields, “Sapphire: A Celebration of Color” by Joanna Hardy completes the fine jewelry expert and author’s trilogy of gemstone books.
“Emerald” was published in 2013 and “Ruby” in 2017.
Hardy’s 30-plus year career spans many facets of the jewelry industry.
The British author started out as a goldsmith, then joined De Beers as a rough diamond valuer. She moved into the auction world when she started at Phillips in London.
She is best known for her 14-year tenure at Sotheby’s, where she was the senior jewelry specialist and auctioneer, responsible for the jewelry auctions in New York, Geneva, and London.

In the introduction to “Sapphire” she writes: “Over the past 10 years I have travelled the globe researching for ‘Emerald,’ ‘Ruby,’ and ‘Sapphire,’ and it has been a journey I would not have missed. I see this trilogy as a global team effort, and I count myself incredibly lucky to have met people who have shared their stories with me and to have worked with the ever-helpful world brands, auction houses, cutters, miners, goldsmiths, designers and historians who have generously shared their knowledge with me.
“I am often asked what my favorite stone is, and my reply has always been I love the best of any gemstone; but, since writing this book, I think my heart has been won by the sapphire of many colors.”
As with her previous books, Hardy explores the sapphire through several lenses.
She begins by delving into early sapphire trading that brought the stone found in Sri Lanka, Myanmar, Cambodia, Thailand, Vietnam, Ethiopia, and France (and more locations like Montana and Madagascar since) worldwide, sharing images of ancient and antique jewelry styles featuring the stone.
Moving through history, Hardy notes sapphire’s notable moments, across cultures and continents, like carved sapphire cameos and even statues, originating from Asia and Europe.

An entire chapter is dedicated to sapphires in royal jewelry, featured in a number of crowns for European royalty, as well as jewelry worn by members of their respective courts.
The extensive accounting of important royal sapphires spans to modern monarchs, like Queen Elizabeth II, and even the blue sapphire engagement ring Prince Charles gave to the late Princess Diana that their son, Prince William the Duke of Cambridge, subsequently gave to his wife, the Duchess of Cambridge.
“Sapphire” also explores some of the most enduring jewelry designers to have worked with the stone, particularly in the 20th century, like Louis Comfort Tiffany, Jacques Cartier, and other members of the Cartier family.
Jewelry houses like Boucheron and Van Cleef & Arpels and some of their most spectacular pieces are also highlighted.
Other makers such as Suzanne Belperron and Oscar Heyman are highlighted in this wide-sweeping account that reads like a “best of” dedicated to the namesake gemstone.

One chapter even highlights the art of collecting, delving into the psyche of collectors who experience the sapphire’s “gravitational pull,” Hardy writes, naming some and leaving others anonymous.
A chapter on 21st century design explores some of contemporary jewelry’s greatest makers, from Hemmerle, Mish Fine Jewellery, Bina Goenka, Silvia Furmanovich, Mellerio, and current pieces from Cartier and Chaumet.
“Sapphire” will present something new to even the most seasoned colored gemstone afficionado.
It will be available through booksellers like Amazon on Nov. 9.
The Latest

Three winners will receive a custom ring from Honest Hands Ring Co. inlaid with a piece of history from Denver-based distillery Stranahan’s.

JD Sports and Wawa were among the fastest-growing retail companies in the U.S. last year.

As a leading global jewelry supplier, Rio Grande is rapidly expanding and developing new solutions to meet the needs of jewelers worldwide.

Acquired by a tech investor, the historic brand will continue to focus on jewelry, accessories, and timepieces.


President Donald Trump issued an executive order extending the pause on higher tariffs to November as negotiations with China continue.

The “Thunderbird Slab” collection features a thunderbird motif as a symbol of power, protection, and boundless possibility.

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

Columnists Jen Cullen Williams and Duvall O’Steen share tips on how to elevate your professional image.

Peter Damian Arguello, a jeweler in the Denver suburb of Wheat Ridge, was found dead inside his store in November 2023.

The retailer, owned by Berkshire Hathaway, is becoming part of the Berkshire Hathaway Jewelry Group with Helzberg.

The Continental Buying Group’s 2025 Tampa Experience Show is slated for Sept. 8-10.

Associate Editor Lauren McLemore recently attended a fabrics trade show where a trend forecaster shared her predictions for summer 2027.

The company raised its full-year sales guidance while noting it has not yet assessed the potential impact of the latest tariff news.

The organization has raised more than $1.3 million for charity since its inception.

The brand’s latest iteration of a bezel-set diamond bangle features clean lines and a timeless design for a new modern silhouette.

The first watch in the series commemorates his participation in the Civil Rights movement, marching from Selma to Montgomery in 1965.

The catalog contains a complete listing of all the loose gemstones in stock, as well as information about the properties of each stone.

The company added a retailer dashboard to its site and three new birds to its charm collection, the cardinal, blue jay, and hummingbird.

An additional 25 percent tariff has been added to the previously announced 25 percent.

The jewelry and accessories retailer plans to close 18 stores as part of the proceedings.

Its Springfield, Massachusetts, store is set to close as owner Andrew Smith heads into retirement.

Designer Hiba Husayni looked to the whale’s melon shaped-head, blowhole, and fluke for her new chunky gold offerings.

She will present the 23rd edition of the trend forecasting book at Vicenzaoro on Sept. 7.

Omar Roy, 72, was arrested in connection with the murder of jeweler Dionisio Carlos Valladares.

The New Orleans-based brand’s “Beyond Katrina” jewels honor the communities affected by the storm.

Lilian Raji explains why joining an affiliate network is essential for brands seeking placements in U.S. consumer publications.