Shown in 1.0 carat Ruby
Shown in 1.0 carat Ruby* The Allison Round Ruby Engagement Ring | Lisa Robin
Shown in 1.0 carat Ruby
Shown in 1.0 carat Ruby* The Allison Round Ruby Engagement Ring | Lisa Robin
Shown in 1.0 carat Ruby
Shown in 1.0 carat Ruby* The Allison Round Ruby Engagement Ring | Lisa Robin
Shown in 1.0 carat Ruby
Shown in 1.0 carat Ruby* The Allison Round Ruby Engagement Ring | Lisa Robin
Shown in 1.0 carat Ruby* The Allison Round Ruby Engagement Ring | Lisa Robin
Shown in 1.0 carat Ruby* The Allison Round Ruby Engagement Ring | Lisa Robin
Shown in 1.0 carat Ruby* The Allison Round Ruby Engagement Ring | Lisa Robin
Shown in 1.0 carat Ruby* The Allison Round Ruby Engagement Ring | Lisa Robin

The Allison Solitaire Ruby 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 ruby.
$ 2,095.00
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How does the Allison differ from a typical ruby engagement ring?

The Allison is a ruby solitaire engagement ring composed by subtraction rather than addition. Four rounded prongs hold the ruby clean above the metalwork; nothing else competes with the center.

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 where it meets the four prongs. The taper draws the eye inward toward the ruby and keeps proportions delicate around the setting so the ruby reads larger by contrast.

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

A solitaire ruby engagement ring lets the color of the center carry the entire design with no accent stones competing for attention. A side stone or halo ruby engagement ring frames the center with diamond accents that add sparkle and visual weight, benefiting a paler or smaller stone.

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 30 to Jul 04
Shipping costs calculated at checkout

Subtraction as a Design Choice

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

The ruby at the center carries the rest of the design's color responsibility. Rubys come in a remarkable range — red across a real spectrum — pinkish red, pigeon's blood, deep burgundy, the rare orange-tinged 'sunrise' rubies from East Africa. A colored gemstone engagement ring with a ruby center is as much about which ruby as about which setting: a deep pigeon's blood reads vivid against yellow gold, a pinkish red warms against rose gold, a burgundy reads intense against white gold. Most couples come to a ruby 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 ruby, 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 Ruby Engagement Ring
The Allison Solitaire Ruby 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

The most durable and traditional choices are sapphire, ruby, and moissanite — all 9 or above on the Mohs hardness scale, which handles everyday wear without protective settings. Emerald, aquamarine, and morganite (7.5-8 Mohs) are slightly softer and read best in bezels, halos, or settings with side accents that shield the stone.
Start with the color you want to see on your hand every day. From there, consider hardness for your lifestyle — sapphire and ruby for hands-on daily wear, softer beryls (emerald, aquamarine, morganite) for protective settings. Symbolism is the third filter: each gemstone carries centuries of meaning, and the right one often resonates without needing to be argued for.
Yes — when matched to the right setting. Sapphire and ruby (Mohs 9) handle anything. Emerald, aquamarine, and morganite (Mohs 7.5-8) are best protected by bezels, halos, or settings that shield the corners and crown. The setting style matters as much as the stone choice for softer gemstones.
Sapphire — especially blue sapphire — is by far the most chosen colored gemstone for engagement rings, in part because it shares diamond's hardness and in part because of its long association with royalty and lasting commitment. Emerald and ruby follow, with morganite gaining popularity in the past decade for its romantic blush and rose gold pairing.
It depends on the gemstone, the quality, and the origin. Lab-created sapphires, rubies, and moissanites can cost a fraction of a comparable diamond. Fine natural Kashmir sapphires, Burmese rubies, and Colombian emeralds can match or exceed diamond pricing per carat. Aquamarine and morganite typically come in well below diamond pricing across the board.
Sapphire signifies loyalty and wisdom. Ruby signifies passion and vitality. Emerald signifies renewal and heart-centered love. Aquamarine signifies clarity and harmony. Morganite signifies compassion and unconditional love. Moissanite, the newest of the six, carries no ancient symbolism but is often chosen for its conscious origins and accessibility.
Daily wear is fine for harder stones (sapphire, ruby, moissanite) and acceptable for softer ones (emerald, aquamarine, morganite) when set protectively. Remove your ring before heavy manual work or chemicals. Clean with warm soapy water and a soft brush. Emerald specifically should never be cleaned in ultrasonic cleaners — the inclusions are fragile.
Yes. Lisa Robin offers both natural gemstones (sourced from ethical mines) and lab-created gemstones with identical chemistry and durability. Natural stones carry origin stories and rarity premiums; lab-created stones offer larger size or higher saturation for the same budget. Each gem in this collection can be sourced either way.
It depends on the gemstone's color. Cooler stones (blue sapphire, aquamarine, deep emerald) read classic against white gold and platinum. Warmer stones (yellow sapphire, ruby, peach morganite) glow against yellow gold. Pink and peach stones warm against rose gold. The metal frames the color — every combination shifts the stone.
Approximately 3-4 weeks from final design approval. Every Lisa Robin colored gemstone engagement ring is made to order — there is no warehouse inventory. The timeline is the same whether you choose a signature design or a fully custom piece.