An exceptional 41.82-carat blue diamond has been recovered from Petra Diamonds, the Cullinan Mine in South Africa, one of the world’s most historically significant sources of large and rare diamonds.

Classified as a Type IIb diamond, this cate

Gallop into the Lunar New Year with our Honesty Box On Jewels, reined in with strength, spirit, and high-shine brilliance.

Inspired by the noble horse this edit is all about pieces that let you ride boldly into the year ahead.

This is your year

At the 2026 Super Bowl Halftime Show, high jewellery featured prominently both on stage and in the stands.

Bad Bunny performed wearing a 2-carat oval desert diamond earring. Lady Gaga selected pieces by Swiss house Chopard. Cardi B appeared in Messi

Happy Valentine’s Day!

Designed with her daughter in mind, Lebanese designer, Joanna Dahdah, draws on her heritage using bright enamel, gold and gemstones. But why choose one when you can have many? We’d choose an embellished heart to re

Unveiled during Paris Haute Couture Week, a new high jewellery suite from Graff is centred on a 31-carat unheated emerald-cut sapphire, set alongside more than 200 carats of white diamonds.

Emerald-cut diamonds are arranged to create a continuous su

With Envol, the Maison of Chaumet unveils its first recent entirely enamelled high jewellery collection, reactivating a technique that has formed part of Chaumet’s vocabulary for nearly 250 years.

Defined by interplays of transparency, gradien

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Honesty Box on Jewels is a jewellery newsletter from gem & jewellery industry experts Kate Matthams Spencer and Katie Manderson.

Each month, we’ll be sharing jewellery news, trends and industry insight, for you to read over weekend morning coffee. We’ll share our favourite new pieces and bring you exclusive views from friends in the jewellery world, for a straightforward look at all that is bright and beautiful in the industry we love so much.

ABOUT THE AUTHORS

Kate Matthams Spencer

Kate Matthams Spencer is a Paris-based British jewellery journalist, editor and consultant with over 20 years’ experience in luxury communications. Former Launch Editor of Vogue France and senior contributor to Forbes, she regularly writes for Vanity Fair on Jewellery, Vogue, Rapaport, Only Natural Diamonds and The Goldsmiths’ Company. With her unique Anglo-French perspective, Kate has shaped international campaigns for Chanel, Saint Laurent, Messika, the World Gold Council and Veuve Clicquot. Co-founder of the acclaimed newsletter Honesty Box on Jewels, she champions independent designers and honest industry insight with wit, authority and genuine passion.

Close-up portrait of a woman with long wavy blond hair smiling at the camera against a plain background.

Katie Manderson

Katie Manderson is the Founder and Creative Director of Honest PR London, a specialist communications agency dedicated to jewellery, watches and luxury. A Central Saint Martins graduate with over 20 years’ experience, she has shaped campaigns for the Responsible Jewellery Council, Gemfields, Bibi van der Velden, William Wood Watches, Fuli Gemstones, Elisabetta Cipriani, GemGenève and many more.

Having begun in fashion with the British Fashion Council, Harrods and Bugatti, Katie found her true calling in the human stories behind fine jewellery. She created Honest PR to champion transparency and tell those stories with elegance and heart.

Co-founder of The Honesty Box on Jewels newsletter with Kate Matthams Spencer.

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Want to be featured?

We’re always on the lookout for exciting new designers, bold collections, one-of-a-kind vintage finds, or fascinating stories from behind the bench. If you’ve got something sparkling to share with our growing community of jewellery lovers, drop us a line!

Simply contact us using the form or email katie@honestprlondon.com - we’d love to hear from you and potentially shine a light on your work in the next edition.