Home Get Inspired Rings Aquamarine & Peridot Toi et Moi Ring for Two Daughters

A 14k yellow gold ring featuring an emerald-cut aquamarine and an oval peridot set side by side, with a small round diamond nestled between them, photographed on a natural stone surface.

Aquamarine & Peridot Toi et Moi Ring for Two Daughters

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14k yellow gold, aquamarine, peridot, diamond

A husband wanted a birthday ring for his wife built around their family's birthstones — aquamarine and peridot for their two daughters, with her own diamond accent set between them. The design went through several rounds of stone-color and size refinement as the couple worked out exactly how deep a blue they wanted and how large the stones should read on her hand before settling on the final pairing.

'Looks good, wife approved! Do want to specify that she wants a darker blue gemstone.' — on seeing the first render

'It looks good. Diamond is smaller than I expected but it does seem to align with the models.' — on delivery

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Birthday Gift for partner For Our Family Birthstone family piece

Quick specs

Design type

Rings

Primary Metal

Yellow gold 14k

Shape / Cut

Emerald

Primary Stone

Aquamarine

Accent Stones

Diamonds Other

Style

Birthday Toi et moi Two-stone

Design Complexity

Moderate

Intent

For Our Family Birthstone family piece

Intent: Certainty

High

Size

Ring size 7.5 US. Aquamarine emerald cut approximately 7x5mm scaled up toward 2ct; peridot oval approximately 8x6mm scaled to match; one round diamond accent between the two stones.

How they made it distinctive

01
Aquamarine and peridot chosen specifically as birthstones representing the couple's two daughters
02
Small diamond set between the two larger stones to represent the wife herself, completing a three-person family reference
03
Emerald-cut and oval shapes paired deliberately in a side-by-side toi-et-moi arrangement rather than a single center stone
04
Aquamarine selected in a deeper, richer blue than typical for the species after direct comparison against blue topaz alternatives
05
Stone scale determined by comparing a finger-width reference image rather than carat weight alone

How you'd make it yours

Stone type: this piece uses aquamarine and peridot; a new commission could use any two birthstones or colored gems in the same side-by-side arrangement

Stone color: a lighter, more common aquamarine tone could be used instead of the deeper rare blue, or blue topaz for a different blue profile at lower cost

Metal: this piece is 14k yellow gold; the same two-stone setting works in 18k gold or white gold

Stone size: this piece uses stones close to 1 carat each; a new commission could go smaller or larger depending on preference

Accent stone: the small diamond between the two main stones could be a birthstone or a lab-created stone instead

One of a kind: this exact ring was designed for one client's family and is not reproduced — a new commission is an original piece inspired by this one, not a copy

Design changes made

The stone sizing was adjusted more than once after the couple compared visual references of the stones at different carat weights against a scale image of the finger, ultimately settling on a size between the two options they had been considering. They also explored moving from aquamarine to blue topaz for a deeper blue before deciding to stay with a richer-colored aquamarine instead.

Who this is for

This piece is for someone who wants a ring built around specific personal meaning — each stone standing in for a person who matters — rather than a single traditional center stone. It's especially right if you like the idea of a deliberate pairing over a symmetrical or matched look, and if you're comfortable taking a little extra time comparing stone colors and sizes to get it exactly right.

How it's made

Once the design was approved, a wax model of the ring was produced using a 3D printer. That wax model was attached to a wax tree and set inside a flask, which was placed in a kiln to burn out the wax and leave a hollow ceramic mold. Molten 14k yellow gold was then cast into that mold, producing the raw ring ready for finishing. After casting, the ring was extracted from the mold, cleaned, and polished to bring out the finish on the gold. The emerald-cut aquamarine and oval peridot were each set into their own prong settings side by side, with the small round diamond set last into the narrow gap between the two larger stones to complete the accent detail.

Key note

The aquamarine and peridot were sourced from the cutter only after the design deposit was paid, since the final stone sizing depended on the couple's approved scale comparison against the finger.

Pricing guidance

A two-stone gold ring with an emerald-cut and an oval colored gemstone, plus a small diamond accent, sits in the mid range for custom rings of this complexity. Labor is the main driver — cutting a clean gallery for two side-by-side stones and setting them independently takes more work than a single center stone. Stone size and color rarity are the biggest variables from there.

Moves price up ↑

↑
Choosing a rarer, more saturated color grade of aquamarine or a larger carat weight for either stone
↑
Increasing the size of both stones toward 2 carats each rather than closer to 1 carat
↑
Upgrading the accent stone from a small diamond to a larger or fancier-cut stone
↑
Adding a halo or pave detail around either of the two main stones
↑
Using 18k gold instead of 14k

Moves price down ↓

↓
Reducing the carat weight of the aquamarine and peridot closer to 0.75 carats each
↓
Choosing a more common, lighter color grade of aquamarine instead of a rare deep blue
↓
Substituting the diamond accent with a lab-created stone or smaller melee
↓
Using a simpler prong setting rather than a more elaborate gallery structure
↓
Choosing sterling silver instead of gold as the base metal

Questions people ask

How durable is aquamarine for everyday ring wear?

Aquamarine rates a 7.5 to 8 on the Mohs hardness scale, which makes it reasonably durable for daily wear, though softer than sapphire or diamond. It can still chip or scratch if struck hard against another surface, so it's worth removing before heavy manual work. Regular cleaning with warm water and a soft brush keeps it looking clear. Most jewelers recommend an occasional prong check to make sure the stone stays secure over years of wear.

Is peridot a durable everyday stone too?

Peridot is softer than aquamarine, rating around 6.5 to 7 on the Mohs scale, so it's a bit more prone to scratching over time. It holds up fine for regular wear but benefits from being removed during activities like gardening, cleaning, or exercise. Peridot can also be sensitive to sudden temperature changes, so ultrasonic cleaners are not recommended. A soft cloth and mild soap and water is the safest way to clean it.

Why does aquamarine color vary so much between stones?

Aquamarine color comes from trace amounts of iron in the beryl crystal, and the depth of blue depends on how much iron is present and how the stone was cut. Most aquamarine on the market is a pale, light blue, while deeper, more saturated blue stones are considerably rarer and command a higher price. Cut and size also affect how the color reads — larger stones tend to show more visible color than small ones. This is why comparing photos of individual stones before committing is worthwhile, since color can vary meaningfully within the same stone type.

Can you use blue topaz instead of aquamarine for a deeper blue color?

Yes, blue topaz is a common alternative when someone wants a more saturated blue than typical aquamarine offers. It comes in a few standard shades, including Swiss blue (brighter, more vivid) and London blue (the darkest and most saturated). Blue topaz is generally more affordable than a rare deep-color aquamarine of comparable size. The tradeoff is that it's a different mineral entirely, so it has a different light behavior and hardness profile than aquamarine.

What does a two-stone ring with aquamarine and peridot typically cost?

A two-stone ring pairing an emerald-cut aquamarine with an oval peridot, plus a small diamond accent, typically falls in the mid range for custom rings once you factor in the double stone-setting labor. The price moves significantly with stone size and aquamarine color rarity, since a deeply saturated aquamarine costs meaningfully more than a standard pale one at the same carat weight. Metal karat is a smaller factor by comparison. Getting a firm number usually requires finalizing stone size and color first.

How long does it take to make a custom two-stone ring?

From approved design to finished ring, the process typically takes around five to six weeks total. The first week or so covers the design phase — sketch, 3D model, and render for approval. Once approved and the stones are sourced, production including casting, stone setting, and finishing generally takes four to five more weeks.

Can the ring be resized after it's finished?

A two-stone ring like this can typically be resized within a reasonable range, since the shank is a continuous band without stones set into it. Larger resizing adjustments are more involved when the setting includes an open gallery structure beneath the stones, since the metal has to be reshaped without disturbing the stone settings. It's best to confirm your ring size as accurately as possible before production to avoid a resize altogether. A local jeweler can typically handle minor resizing after delivery.

Can you set a diamond between two larger stones like this?

Yes, a small accent stone set in the gap between two larger side-by-side stones is a common way to add detail to a two-stone or toi-et-moi style ring without competing with the main gems. The accent is usually set low and close to the two larger stones so it reads as a connecting detail rather than a third focal point. Because the accent stone is small, it doesn't significantly change the overall cost of the piece. It does add a bit of extra hand-setting work compared to a plain two-stone ring.