The 10 Most Expensive Engagement Rings at Tiffany’s

The Tiffany & Co. blue box is arguably the most recognizable luxury symbol on earth. It represents a promise of quality, legacy, and, for a select few, unparalleled extravagance. While the “classic” Tiffany Setting starts around $15,000, the 1% doesn’t shop from the glass case.

They are escorted to a private salon at “The Landmark” (the newly redesigned Fifth Avenue flagship) to view the “High Jewelry” collection. These are not just rings; they are one-of-a-kind wearable sculptures, built around “legacy” stones—diamonds so large and so perfect they have their own names. We’re talking 10, 20, or even 50 carats.

We’re opening the velvet box on the most expensive rings in the world. This article is part of our exclusive series, The AZ New York 100, where we decode the secrets of the super-rich.

The 10 Most Expensive Engagement Rings at Tiffany’s

The “most expensive” rings at Tiffany’s are almost never listed publicly. They are one-of-one creations built around a single, magnificent stone. The price is determined by the “Four Cs” (Cut, Color, Clarity, Carat) and a fifth “C”: *Character*. Here are 10 *types* of rings that define the $1M+ “High Jewelry” category.

1. The “Flawless” 10-Carat: The classic. A 10-Carat, D-Color, Internally Flawless (D-IF) diamond in the “Tiffany Setting.” This is the benchmark for the “perfect” ring. **Price: $1.5M – $2.5M**
2. The “Emerald-Cut” 15-Carat: A massive “emerald-cut” stone. This cut acts like a “hall of mirrors” and requires extreme clarity. A 15-carat, D-Flawless emerald cut is a power statement. **Price: $3M – $4M**
3. The “Fancy Vivid” Yellow: The “holy grail” of colored diamonds. A 10-Carat “Fancy Vivid” yellow diamond (the highest color saturation) is rarer than a white diamond. **Price: $2M – $3M**
4. The “Rare” Pink: A 5-Carat “Fancy Intense” Pink diamond. Pink diamonds are among the rarest gems on earth, primarily sourced from the now-closed Argyle mine. This is an investor’s piece. **Price: $4M – $6M**
5. The “Legacy” Stone (20+ Carats): This is a “trophy” stone. A 20-Carat, D-Flawless, Type IIa diamond. This is the ring you see on a billionaire’s fiancée at the Met Gala. **Price: $5M – $8M**
6. The “Tiffany” Yellow Diamond: While the 128-carat original is “priceless” (and not for sale), Tiffany’s offers “smaller” (10-20 carat) vivid yellow diamonds in settings inspired by the icon. **Price: $1M – $3M**
7. The “Patek” of Rings (The Ashoka Cut): The “Ashoka” cut is a proprietary, 62-facet cut that makes the diamond look 30% larger. A 10-Carat Ashoka-cut ring is an “if-you-know-you-know” (IYKYK) choice. **Price: $2.5M+**
8. The “Perfect” Cushion Cut: A 12-Carat, D-Flawless Cushion cut, set in the “Tiffany True” setting. This is the “modern classic” for the “New Money” buyer. **Price: $2M+**
9. The “Blue” Diamond: A 3-Carat “Fancy Vivid” Blue diamond. Arguably the rarest (and most expensive per-carat) gem in the world. This is a “collector’s” ring, not just an engagement ring. **Price: $6M – $10M+**
10. The “Setting” Commission: The ultimate ring. The client *provides* the stone (e.g., a 30-Carat family heirloom) and commissions Tiffany’s legendary artisans (like Jean Schlumberger‘s workshop) to build a one-of-a-kind “Bird on a Rock” setting for it. **Price: $1M+ (for the setting alone).**

Comparative Table: The “Million-Dollar” Diamond Choice

What does $2M buy? You are choosing between “Size” (a big white diamond) and “Rarity” (a smaller colored one).

3 Case Studies: The “Blue Box” Client

1. The “Classic” Mogul (The 10-Carat D-Flawless): This is a finance CEO or real estate titan. They want “the best,” and “the best” means “big” and “perfect.” They are buying the benchmark. The $1.5M price for a 10-Carat, D-Flawless “rock” is a timeless, “Old Money” statement of power.
2. The “New Money” Celebrity (The “Vivid” Yellow): This is the “trophy” ring for a celebrity, musician, or tech founder. A “Tiffany Yellow” diamond is a statement of modern, fashionable luxury. It’s less about “flawless” tradition and more about “wow” factor, color, and size.
3. The “Connoisseur” (The Pink/Blue): This is the true “investor” client. They are buying the ring as an *asset*. They know that a 3-Carat Fancy Vivid Blue diamond is rarer (and will appreciate faster) than a 15-Carat white one. They are buying an “investment-grade” gem that they can also wear.

💡 Pro Tips: How to Buy a “High Jewelry” Ring

• You Shop in a “Salon,” Not a “Store”: You don’t buy a $1M ring in the public showroom. You are escorted (often by appointment) to a private, upper-floor “salon” where a “High Jewelry” specialist presents the stones to you one-on-one.
• The “GIA Certificate” is Everything: The “Fifth C” is “Certification.” A diamond’s value is 100% dependent on its GIA (Gemological Institute of America) certificate. This is the non-negotiable “passport” that proves its Color (D-F), Clarity (Flawless/VVS), and origin.
• The “Setting” is the Signature: The “Tiffany Setting” (the classic six-prong, elevated setting) is the most famous in the world. When you buy from Tiffany’s, you are paying a premium not just for the stone, but for the “Blue Box” and the legacy of that iconic setting.

✨ NYC Luxe Curiosities

• The “Tiffany Yellow”: The “king” of all Tiffany diamonds is the 128.54-carat “Tiffany Diamond.” It is “priceless” and not for sale. It has only been worn by four women in history (including Audrey Hepburn and Beyoncé).
• “D-Flawless”: This is the “perfect” diamond. “D” is the highest, most “colorless” grade. “Internally Flawless” (IF) or “Flawless” (F) means it has zero inclusions, even under 10x magnification. This is the benchmark for “investment-grade.”
• “The Landmark”: The newly renovated Tiffany’s on Fifth Avenue is now called “The Landmark.” The entire top floor is a “High Jewelry” workshop and private salon, reinforcing the importance of their 1% clientele.

🧐 FAQ: The Million-Dollar Ring

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