Leon Mege Mon Cheri™

Leon Mege Mon Cheri diamond ring with French cuts and True Antique cushion diamond

Inspired by nature and refined over decades, Leon Mege Mon Cheri™  has been designed to capture and deliver the very essence of a diamond directly to your heart. Truly a one-of-a-kind design that caresses and nurtures your soul equally well in the middle of the Champs-Élysées hustle and bustle or Place Vendôme upscale tranquility.

The Leon Mege Mon Cheri is one of the most sought-after engagement rings in the world and for good reason. Each takes about 50 hours for a single artisan to make, not counting weeks of faceting French cuts. Leon Mege’s craftsmanship is unparalleled, and since the house only produces a limited number of Mon Cheri designs each year, their rarity makes it all the more exclusive. Mon Cheri rings are highly sought-after by collectors due to the exceptional level of artistry poured into their unique designs.

The Most Beautiful Theorem in Mathematics

Mon Cheri™ is Leon Mege’s exclusive engagement ring design incorporating a flared shank with graduated French-cut diamonds in a seamless channel. It is a brilliant explosion engulfing the center stone thanks to the eye-pleasing curvature of the flare, the product of logarithmic calculations applied to the golden section, and Euler’s identity (e iπ + 1 = 0).

Leon Mege exclusive Mon Cheri ring illustration

The French-cut diamonds are scarce and take a long time to cut, but they give Mon Cheri™ the perfect synthesis of tradition and chic for an elegant fit and full grandeur.

The size of the French cuts dramatically affects the cost of the whole mounting. Each precision-cut set of French cuts must be matched with an adequately sized center stone. Mon Cheri™ style looks best with gently elongated True Antique cushion diamonds. Colored gemstones, lab-grown diamonds, and Leon Mege Blonde moissanite are also available.

The center stone can be secured with various prongs, but our legendary eagle-claw prongs are the most popular. The channel walls are thin; they can be left smooth or millgrained for extra vintage flair. Mon Cheri™ rings are precision-forged in platinum or 18-karat gold.

Craftsmanship Without Any Reservations

Century-old rolling mills, die punches, and wire drawing benches are some of the tools we use. They transform gold and platinum bars, plates, and wires into individual parts. This is the highest level of precision and superb artistry you’d expect from an accomplished master jeweler.

Leon Mege Mon Cheri ring side view

The quality of the ring is outstanding, and my fiancé was blown away when she saw it for the first time. The attention to detail and the craftsmanship are evident, and the ring sparkles so much that we have to cover it at night so we can sleep. Just kidding. It is simply stunning. Overall, I couldn't be happier with my experience. I will definitely recommend Leon Mege to friends and family in the future.

Joshua B. Avenal, CA

From the moment I found your store, I became obsessed with the Mon Cheri, I was welcomed with a big smile when I first thought that I can wear the ring the same day. What a pity! I had to wait long 5 and a half weeks to get mine custom made. I was expertly guided through the process of selecting my gorgeous 1.76 carot diamond. They were incredibly patient, answering all of my questions along the way and in the end, I own the most brilliant ring in the world. Too bad I had to wait so long, their custom work is pretty slow for me, I wanted it right away!


I wanted to reach out and thank you for the wonderful experience I had ordering my engagement ring from your company. Despite initial hesitations about making such an important purchase without seeing it in person, I am overjoyed with the end result. Your website was incredibly easy to navigate, and I appreciated the humor and honesty in describing your work. Oh yes, and high-quality images of the diamonds were very helpful.

Kim N. Sidney, Australia

The ability to customize the ring to my liking was a huge plus, and the process was straightforward and simple. When the ring arrived, I was blown away by its beauty and quality of jewelry work. It exceeded my expectations in every way, and I knew it was the perfect choice for us.

Andy C. Chicago, IL

It's just so beautiful and unique! Thank you Leon! We will be back for the wedding bands.

Danielle G. Lexington, MA

Throughout the entire process, I felt supported and informed by Leon Mege and his assistant Rachel. They promptly answered all of my questions and concerns and made the experience stress-free and enjoyable, especially when I was choosing the diamond. My Mon Cheri ring is so beautiful I hesitate to wear it every day but Leon assured me it is very sturdy ring design that can be worn daily.

Amy W. Fort Worth, TX

I just wanted to take a moment to express my gratitude for the exceptional service I received when having my beautiful Mon Cheri engagement ring custom made. The process was seamless from start to finish, and I couldn't be happier with the result. Leon was incredibly knowledgeable and patient with me, taking his time to explain the different types of French cut diamonds. He helped me choose the perfect ring that I could afford on my budget.

Brian G. Providence, Rhode Island
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