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
Fine Diamond Jewelry, Engagement Rings, and Wedding 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
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The Allison is composed in a single gesture: a tapered band narrowing toward the aquamarine center, four rounded prongs holding it clean above the metalwork. No accents, no halo, no shoulders — just the stone and the line that carries the eye to it.

Metal Options 14K Yellow Gold, 14K White Gold, 14K Rose Gold, or Platinum. Sustainably sourced.
Style Aquamarine solitaire engagement ring
Setting Four rounded prongs
Band Tapered from 1.4mm to 1.3mm at center
Setting Height Medium
Band Profile Tapered solitaire
Crafting Time Approximately 3-4 weeks

Setting starts at $2,095. Final pricing varies based on the aquamarine you choose.

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

The Allison is an aquamarine solitaire engagement ring composed by subtraction rather than addition. Where most settings frame a colored center with accents — halos, side stones, scattered diamonds — the Allison removes them. The tapered band narrows toward four rounded prongs that hold the aquamarine clean above the metalwork; nothing else competes with the center. The design assumes the color of the aquamarine is enough on its own. Choose the Allison when the stone you have chosen carries the design without needing accent geometry around it.

Why does the Allison taper the band toward the setting?

The Allison's band tapers from full width at the back of the ring down to a narrower point where it meets the four prongs holding the aquamarine. The taper does two things at once: it draws the eye inward toward the center stone (the band visually points to the aquamarine), and it keeps the proportions delicate around the setting itself so the aquamarine reads larger by contrast. A uniform-width band would compete visually with the center; the tapered band steps out of the way.

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

A solitaire aquamarine engagement ring lets the color of the center carry the entire design — no accent stones competing for attention, no halo amplifying brilliance, just the aquamarine and the band. A side stone or halo aquamarine engagement ring frames the center with diamond accents that add sparkle and visual weight. The choice depends on the aquamarine itself: a deeply saturated, well-cut center aquamarine often holds its own as a solitaire, while a paler or smaller stone benefits from the brilliance of accent diamonds around it. Saturated color reads quietest in a solitaire; color that needs amplification reads louder with accents. An aquamarine ring this color-led suits couples who want the gem itself to lead the design rather than the metal around it. As a blue gemstone engagement ring, the Allison reads as color carried by structure rather than color set against ornament.

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 Jun 20 to Jun 24
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

Frequently Asked Questions About Gemstone Engagement Rings

Each engagement ring is made to order and ships in approximately 3-4 weeks from design approval. Crafting begins only after you've reviewed and approved the renderings of your final design.

The setting price shown on each product page does not include the center gemstone. The center gemstone is selected separately and quoted based on variety, color, clarity, size, and origin. Final ring pricing combines the setting and the gemstone you select. We share pricing for any modifications transparently before the order is approved.

Yes, through two paths. To personalize a design as shown, order online and select your gemstone, metal, and finger size. To modify a design or create something fully custom, book a private design appointment with Lisa. Modifications can include adapting the design to a different gemstone shape, adjusting band width, refining prong style, or coordinating the design with a future wedding ring. Any pricing changes for modifications are shared and approved before crafting begins.

Natural gemstones are formed in the earth over millions of years — each one is unique in color, clarity, and character. Lab created gemstones share the same physical and chemical properties as their natural counterparts, produced in a controlled environment. Natural gemstones are available through the online selection. Lab created gemstones can be made available by appointment — contact us to discuss your options.

Color is the most personal part of selecting a gemstone. Saturation, tone, and hue vary significantly even within the same variety — two sapphires can look entirely different. During your design process, we guide you through what to look for based on your setting, metal choice, and personal preference. If you'd like one-on-one guidance, a private design appointment with Lisa is the most direct path to finding the right gemstone for your ring.

Durability varies by gemstone variety. Sapphire and ruby rank among the hardest gemstones available, making them well suited for everyday wear. Emerald, morganite, and aquamarine require slightly more care but are appropriate for an engagement ring worn with intention. We discuss durability as part of your gemstone selection — so the gemstone you choose fits both your style and your lifestyle.

Most natural gemstones on the market undergo some form of treatment — heat treatment is standard practice for sapphires and rubies and is widely accepted in the industry. We are transparent about treatment status for every gemstone we source. If treatment disclosure matters to you, it's one of the details we cover during your design process so you can make an informed decision.

Lisa Robin engagement rings are designed by Lisa Robin Adkinson in our private design studio in Dayton, Ohio, and hand-crafted by skilled jewelers in our New York workshop. Every ring is made in the USA, using ethically sourced materials including recycled precious metals and responsibly sourced gemstones.

After your order is placed, we begin the design process. You'll receive detailed renderings of your final design — gemstone, metal, design, and any modifications you've requested. You review and approve every detail before crafting begins. If anything doesn't feel right, we adjust. Once you approve, your ring is hand-crafted in approximately 3-4 weeks and shipped insured in a Lisa Robin keepsake box.

Because each engagement ring is made to order specifically for you, custom and made-to-order rings are not returnable once crafted. We make this transparent up front so you can plan accordingly. To protect your decision, we provide detailed renderings of your design before crafting begins. You review and approve every detail — gemstone, metal, design, and any modifications — before we make your ring. If anything in the rendering doesn't feel right, we adjust. Your ring is only crafted after you've approved the design.

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