Shown in 1.0 carat Aquamarine
Shown in 1.0 carat Aquamarine* The Allison Round Aquamarine Engagement Ring | Lisa Robin
Shown in 1.0 carat Aquamarine
Shown in 1.0 carat Aquamarine* The Allison Round Aquamarine Engagement Ring | Lisa Robin
Shown in 1.0 carat Aquamarine
Shown in 1.0 carat Aquamarine* The Allison Round Aquamarine Engagement Ring | Lisa Robin
Shown in 1.0 carat Aquamarine
Shown in 1.0 carat Aquamarine* The Allison Round Aquamarine Engagement Ring | Lisa Robin
Shown in 1.0 carat Aquamarine* The Allison Round Aquamarine Engagement Ring | Lisa Robin
Shown in 1.0 carat Aquamarine* The Allison Round Aquamarine Engagement Ring | Lisa Robin
Shown in 1.0 carat Aquamarine* The Allison Round Aquamarine Engagement Ring | Lisa Robin
Shown in 1.0 carat Aquamarine* The Allison Round Aquamarine Engagement Ring | Lisa Robin
Solitaire Engagement Rings

The Allison Solitaire Aquamarine Engagement Ring

The Allison is a solitaire designed to let color do the work of ornament. Where most colored gemstone settings add accents around the center, the Allison subtracts them — the band tapers inward toward the prongs, and nothing else competes with the aquamarine.
$ 2,095.00
/
Color
Shape
Add gemstone

How does the Allison differ from a typical aquamarine engagement ring?

The Allison is an aquamarine solitaire engagement ring designed by subtraction. The tapered band narrows toward four rounded prongs that hold the aquamarine clean above the metalwork, with no halos or accent stones competing for attention.

Why does the Allison taper the band toward the setting?

The Allison's band tapers from full width at the back down to a narrower point at the prongs. This draws your eye inward toward the aquamarine and keeps proportions delicate so the center stone reads larger by contrast.

How do I choose between a solitaire and a side stone aquamarine engagement ring?

A solitaire aquamarine engagement ring lets the color carry the entire design without accent stones, while a halo or side stone setting frames the center with diamonds. Deeply saturated aquamarines hold their own as solitaires; paler stones benefit from the brilliance of accents.

Our guided approach to customizing each ring with intention and clarity.

Every Lisa Robin ring is made to order, which means your design can be thoughtfully refined—even when ordering online. Whether you’re adjusting a detail or evolving the design, we guide you through each decision to ensure the final piece feels cohesive and entirely yours.

Design Refinements can be explored after your initial order, with any pricing adjustments clearly outlined and approved before crafting begins.

Refinement options include but are not limited to:

  • Adjusting the width or taper of the band (shank)
  • Modifying or adding side diamonds for additional detail or presence
  • Changing the prong style (claw, round, double prong, etc.)
  • Adjusting the number of prongs for both aesthetic and structure
  • Refining the basket design for a different profile or overall look
  • Selecting your preferred metal type and color
  • Adapting the design to better coordinate with a wedding ring
Made to order — Your diamond engagement ring ships in 3-4 weeks, approximately Jul 15 to Jul 19
Shipping costs calculated at checkout

Subtraction as a Design Choice

Subtraction is a design choice. The Allison works by what isn't there.

The aquamarine at the center carries the rest of the design's color responsibility. Aquamarines come in a remarkable range — pale ice through sky to deep sea blue, with the rarer Santa Maria deep blue and Espirito Santo bluish-green at the saturated end. A colored gemstone engagement ring with an aquamarine center is as much about which aquamarine as about which setting: a pale ice reads delicate against white gold, a Santa Maria blue holds its own against yellow gold, a sea blue warms against rose. Aquamarine is softer than sapphire (7.5-8 Mohs), which makes the protective setting style here important — bezels and halos protect the stone from everyday wear. Most couples come to an aquamarine engagement ring expecting one color and leave open to the range.

On the hand, the Allison reads as architecture in service of color — the tapered line concentrates attention on the center aquamarine, and the absence of ornament keeps the eye from wandering. The Allison joins a Lisa Robin tradition of solitaire engagement rings designed for couples who choose by hue, not by halo.

The Allison Solitaire Aquamarine Engagement Ring
The Allison Solitaire Aquamarine Engagement Ring

How Lisa Robin Designs Your Gemstone Engagement Ring

From gemstone selection to CAD approval, every decision is guided by Lisa personally.

Online Ordering
Begin your custom gemstone engagement ring through a guided online experience designed to bring clarity to each decision. From understanding gemstone options to exploring engagement ring settings, the process is supported by in-depth educational resources throughout the site.

If you'd like to personalize your design, you can place your order at any time — we'll follow up to refine the details and ensure everything aligns with your preferences.

Private Design Appointments
For a more collaborative experience, work with us one-on-one, either in person or virtually. Your engagement ring consultation is tailored to you — we guide you through each decision in real time, shaping your gemstone engagement ring with clarity and intention.

Browse available certified gemstones sourced from trusted suppliers through the Lisa Robin gemstone collection.

As you explore your engagement ring, you can review gemstones by variety, color, and overall presence to select the one that best complements your design.

We guide you through how each gemstone interacts with your setting — so the final ring feels balanced, intentional, and cohesive.

Certified natural gemstones are available through the online selection. Lab created gemstones can be made available by appointment — contact us to discuss your options.

Before your ring is hand-crafted, you’ll review detailed CAD renderings created using your diamond’s exact dimensions.

Multiple views allow proportions, balance, and design details to be carefully considered—so you can feel confident in how your engagement ring design will come together before crafting begins.

If a wedding ring is selected within the same order, renderings will also show each ring individually and together, helping you understand how they pair and flow as a set.

Once your design is approved, your ring is hand-crafted specifically for you using carefully selected materials and an ethically sourced gemstone.

Each ring is a made to order engagement ring, typically completed in approximately 3-4 weeks.

You can choose secure, fully insured shipping or private studio pickup. Throughout the process, we remain available to guide you — so you always know what to expect at every stage.

What our customers say about their Lisa Robin Gemstone Engagement Rings

I loved working with Lisa Robin! It was so easy to create exactly what I wanted. With some minor changes to Lisa's gorgeous styles, I had the perfect wedding ring to coordinate with my Lisa Robin Engagement Ring. Can’t wait to add another ring to my stack.

Abby and Zane
Blountville, Tennessee

Our experience with Lisa Robin was delightful. We found our Lisa Robin engagement ring Instagram and then picked out and bought our wedding rings online. Every question we had was answered quickly. Lisa made us feel special and guided us in the right direction. When we got our rings, they were just what we wanted, expressing our style and love perfectly. We are so happy with how everything turned out.

Mary Katherine and Adam
Columbus, Ohio

Find Your Matching Wedding Band

From the bottom the stack is styles with the Jamie gold band, the Allison engagement ring, and the Kendall to cap it off.

Diamond Wrap Ring - Lisa Robin
Double Row Open Ring - Lisa Robin

More about Lisa Robin solitaires

A solitaire engagement ring is any engagement ring with a single center diamond and no side diamonds. The setting style can vary widely — classic four-prong, bezel, east-west, twist, hidden halo, or a band with scattered diamond accents — but the defining feature is one center diamond with no diamonds set beside it. The differentiator is the absence of side diamonds, not the prong configuration.
Solitaire engagement ring settings start at $2,095. A 1 carat lab grown diamond adds approximately $900, bringing most solitaires to around $2,995 fully crafted. Natural diamonds, larger carat weights, and colored diamonds price independently. We share itemized quotes so you see exactly what each component costs.
Yes. A solitaire is defined by having one center diamond and no side diamonds — not by how the diamond is held. A bezel-set ring with no side diamonds is a solitaire. So is an east-west, twist, or hidden halo design with no side diamonds. These rings cross-list in their setting-style collections too, but they belong here first.
Every shape works in a solitaire — round, oval, emerald, princess, marquise, pear, cushion, asscher, and radiant. Round is the classic choice. Oval and emerald are the most-requested elongated shapes. Marquise and pear flatter long fingers. Princess, cushion, asscher, and radiant offer modern or vintage architectural feels. We help you pick the shape that fits your hand and your style.
Yes. The Allison and Polaris settings are available with sapphire, ruby, emerald, aquamarine, morganite, yellow diamond, blue diamond, green diamond, pink diamond, and champagne diamond centers. We can also build any of our solitaire designs around a colored diamond or gemstone you'd like to feature — book a private design appointment to discuss options.
3–4 weeks from the day your order is finalized. Diamond selection, CAD review, casting, setting, and inspection happen in that window. We keep you in the loop at every stage and share photos at key milestones if you'd like.
Yes. Every solitaire can be made in 14K yellow, white, or rose gold or platinum, with the diamond shape, carat weight, and quality of your choice. We also build fully bespoke solitaires for couples who want something not in the standing collection — book a private design appointment to start.
It does — visibly. A halo of small diamonds around the center diamond extends the visual footprint of the setting, so a solitaire and a halo with identical center diamonds will read differently on the hand. The solitaire shows the diamond at its actual size; the halo amplifies it visually. Whether that's the right tradeoff depends on the diamond itself. A 1.5 carat solitaire reads substantial on its own; a 0.75 carat halo can read like a larger center. We discuss this directly when you're choosing between formats.
Both are real diamonds with identical chemistry, optics, and durability — you cannot tell them apart by eye or with a jeweler's loupe. The difference is provenance and price. Lab grown diamonds are about a quarter of the price of natural diamonds of the same specifications, which means a 1 carat lab grown is in reach for many couples where a 1 carat natural isn't. Most Lisa Robin couples choose lab grown for the larger carat weight it brings within reach in a solitaire, where the diamond carries the entire ring. We'll show itemized pricing on both before you decide.
Easily — that's part of the design intent. A solitaire engagement ring is the most flexible engagement ring shape for wedding ring pairing, working with straight bands, curved bands, eternity bands, and stacked combinations. Low-profile solitaires (where the diamond sits close to the finger) pair flush with most wedding rings. Higher cathedral solitaires lift the diamond up and forward, leaving more room beneath the diamond for a contoured wedding ring. We plan the wedding ring pairing during the engagement ring design — especially if you want both rings to read as one set.
Back to Solitaire Engagement Rings