Secret Diamond Rings: The Hidden Stone Only You Know About

Updated October 2026 · By Yaniv Segal, founder of Segal Jewelry, Los Angeles

A secret diamond ring has a small surprise stone set inside the ring, where the wearer sees it and almost no one else does. From the outside the ring looks like any other engagement ring. The hidden diamond is a private detail between the two of you, and you can pair it with a free engraving. It is one of our signature touches.

Emerald cut black diamond pavé double shank engagement ring with hidden stone in rose gold
The Gorgeous Emerald Cut Black Diamond Pave Double Shank Engagement Ring With Hidden Stone - Veronica No. 8, one of our hidden stone designs.

What is a secret diamond ring?

Our product pages describe it simply: a dazzling surprise stone inside the ring. It is a small diamond placed where only the wearer will notice it.

Everything else about the ring stays the same. You still choose the center stone, the metal and the size, and the hidden diamond comes along as part of the design.

We think of it as the jewelry version of a note tucked into a pocket. It is there for one person, every day.

Why choose a hidden diamond?

Most of a ring is designed to be seen by other people. A secret diamond flips that around and makes one part of the ring just for the wearer.

  • It adds meaning without changing the look of the ring.
  • It makes a proposal moment more personal when the wearer discovers it.
  • It works with any center stone, from black diamond to emerald.
  • It pairs naturally with a free engraving of a date, name or word.

Which rings come with a secret diamond?

Our Secret Diamond Collection holds 1,459 designs, and the secret diamond engagement rings collection narrows that to proposal styles.

Many of these designs carry "With Hidden Stone" in the product name. Here are a few examples:

Design Center shape Center stone Band Price
Miriam No. 37 Marquise Black diamond Pavé From $2,906
Ophelia No. 64 Oval Emerald Pavé From $4,379
Veronica No. 81 Emerald cut Black diamond Pavé, two tones From $5,356
Phoebe No. 80 and No. 81 Oval Black diamond Pavé double shank, two tones From $6,418
Veronica No. 8 Emerald cut Black diamond Pavé double shank From $7,012

The black diamonds in these designs are natural and color-enhanced. They give the outside of the ring a bold look, while the hidden diamond stays a quiet surprise.

Two tone oval cut black diamond pavé double shank engagement ring with hidden stone in two-tone gold
The Two Tones Gorgeous Oval Cut Black Diamond Pave Double Shank Engagement Ring With Hidden Stone - Phoebe No. 80, a two-tone double shank.

Hidden diamond, engraving or both?

A secret diamond and an engraving do a similar job: they make the ring personal in a way only the wearer fully knows. Many couples combine them.

Personal touch What it adds Who sees it Cost
Secret diamond A small surprise stone inside the ring Mainly the wearer Part of the hidden stone design
Engraving A date, name or short message The wearer, when the ring is off Free
Both Sparkle plus words that mean something Only the two of you Engraving stays free

Keep engravings short so they read clearly. A date, initials or a single word often says more than a full sentence.

Hidden diamonds in other settings

The idea also appears in our Hazel rings, which pair a hidden diamond with double cat claw prongs that hold the center stone. Hazel No. 1, in a 2 carat example, starts from $4,430.

If you want to know more about that prong style, our guide to cat claw prongs explains how they work.

A hidden halo is a different idea. It is a ring of small stones under the center, visible from the side; our hidden halo vs double halo guide covers it.

Marquise cut black diamond pavé engagement ring with hidden stone in yellow gold
The Gorgeous Marquise Cut Black Diamond Pave Engagement Ring With Hidden Stone - Miriam No. 37, a marquise black diamond with a hidden stone.

How to choose a secret diamond engagement ring

  1. Pick the center shape first: oval, marquise or emerald cut.
  2. Choose the center stone and metal; the main photo switches to your exact selection.
  3. Decide between a single band or a double shank.
  4. Add a free engraving if you want words as well as the hidden stone.
  5. Try the design on your finger with a replica before the final order.

Our Try It In Real Life replica is $199 for any ring design, in sizes 4 to 13 including half sizes. You keep it, and the full $199 is credited on orders of $1,000 or more.

Want the hidden diamond in a ring you saw elsewhere? Send us a picture through custom ring from a photo.

Every ring is made to order in Los Angeles with conflict-free stones, a lifetime warranty, free 60-day resizing and free worldwide shipping.

Shop the look

Shop secret diamond engagement rings Shop the Secret Diamond Collection

Frequently asked questions

What is a secret diamond? It is a small surprise stone set inside the ring. The wearer sees it, while from the outside the ring looks like a regular design.

Can other people see the hidden diamond? It is placed so that it is mainly visible to the wearer. That privacy is the point of the design.

Which center stones work with a secret diamond? Our hidden stone designs include black diamond and emerald centers in oval, marquise and emerald cut shapes.

Can I add an engraving too? Yes. Engraving is free, and many couples pair a date or name with the hidden diamond.

How much is a secret diamond engagement ring? Prices vary by design and stone. Miriam No. 37 starts from $2,906 and Ophelia No. 64 from $4,379.