Shown in 1.5 Carat Diamond
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in yellow gold from front by Lisa Robin
Shown in 1.5 Carat Diamond
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in white gold on model hand by Lisa Robin
Shown in 1.5 Carat Diamond
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in white gold on model hand by Lisa Robin
Shown in 1.5 Carat Diamond
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in white gold from front by Lisa Robin
Shown in 1.5 Carat Diamond
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in rose gold from front by Lisa Robin
Shown in 1.5 Carat Diamond
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in platinum from front by Lisa Robin
The Katharine Solitaire Diamond Engagement Ring with round cut diamond in yellow gold paired with the Genevieve Hexagon Round Diamond Yellow Gold Engagement Ring on model hand by Lisa Robin Jewelry
The Katharine Solitaire Diamond Engagement Ring with round cut diamond in yellow gold on model hand by Lisa Robin Jewelry
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in white gold on model hand by Lisa Robin#color_14k-white-gold
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in yellow gold from front by Lisa Robin
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in white gold on model hand by Lisa Robin
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in white gold on model hand by Lisa Robin
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in white gold from front by Lisa Robin
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in rose gold from front by Lisa Robin
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in platinum from front by Lisa Robin
The Katharine Solitaire Diamond Engagement Ring with round cut diamond in yellow gold paired with the Genevieve Hexagon Round Diamond Yellow Gold Engagement Ring on model hand by Lisa Robin Jewelry
The Katharine Solitaire Diamond Engagement Ring with round cut diamond in yellow gold on model hand by Lisa Robin Jewelry
The Katharine Solitaire Diamond Engagement Ring with round cut diamond in yellow gold on model hand by Lisa Robin Jewelry
The Katharine Solitaire Diamond Engagement Ring with round cut diamond in yellow gold on model hand by Lisa Robin Jewelry
Shown in 1.5 Carat Diamond*The Katharine Solitaire Diamond Engagement Ring with round cut diamond in white gold on model hand by Lisa Robin#color_14k-white-gold
Classic Engagement Rings

The Katharine Diamond Solitaire Engagement Ring

The Katharine is a classic solitaire engagement ring defined by a six-prong tiara setting and a bold 3mm knife-edge band — a setting that holds your center diamond with crown-like reverence and a band that adds its own line of light to the design. A round solitaire engagement ring built around lift and luminosity.
$ 2,495.00
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The Katharine's six-prong tiara setting lifts your center diamond higher than a four-prong solitaire and creates crown-like symmetry around it — more light through the facets, more presence above the band. The 3mm knife-edge band tapers to a fine ridge along its outer surface, catching light independently of the center diamond, so the band itself feels luminous even in quiet moments.

Metal Options 14K Yellow Gold, 14K White Gold, 14K Rose Gold, or Platinum. Sustainably sourced.
Style Solitaire engagement ring
Setting Six rounded prongs
Band 3mm
Setting Height High
Band Profile Bold modified knife edge
Crafting Time Approximately 3-4 weeks

Setting starts at $2,495. Paired with a 1 carat lab grown diamond center, the Katharine diamond solitaire engagement ring starts at approximately $3,395.

What is a knife-edge band and what does it do for the ring?

A knife-edge band rises to a fine ridge along the center of its outer surface, like the edge of a blade, rather than being flat or rounded. That ridge catches light along the length of the band, so the Katharine's 3mm band stays luminous on its own — adding sparkle from the metal itself, independent of your center diamond.

Why does the Katharine use six prongs rather than four?

Six prongs form a tiara-like setting that lifts your center diamond higher and surrounds it with crown-like symmetry. The extra prongs hold the diamond more securely and let more light through its facets from the sides, while reading as more ornamental than the cleaner four-prong look.

How is a classic solitaire different from a contemporary or minimalist solitaire engagement ring?

A classic solitaire like the Katharine adds traditional detail — here a six-prong tiara head and a knife-edge band — for a more ornamental, elevated presence. A minimalist solitaire strips those elements back to a plain band and simple head, keeping the focus entirely on the diamond. Both center a single diamond; the difference is how much the setting speaks alongside it.

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 so 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:

  • Adjusting the width or taper of the band
  • 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 is crafted in 3 to 4 weeks after you approve your design Dec 06 to Dec 10
Shipping costs calculated at checkout

Find Your Matching Wedding Band

The Katharine styled with the Sutton Oval Diamond Eternity Ring.

The Valentina curved lab diamond in 14K yellow gold wedding ring from front by Lisa Robin#color_14k-yellow-gold
Valentina Curved Diamond Wedding Ring

The Katharine Diamond Solitaire Engagement Ring

A solitaire engagement ring is one of the oldest symbols in jewelry — a single diamond, held with complete focus, the way a singular love deserves to be held. The form has existed for centuries because it works.

The Katharine takes that symbol and gives it a more distinguished expression. The six-prong tiara setting crowns the center diamond with crown-like symmetry, lifting it higher and letting more light reach every facet. The 3mm knife-edge band adds its own line of brightness beneath, catching light independently of the diamond above. As a classic solitaire built around lift and luminosity, the Katharine reads as a round solitaire engagement ring of enduring composition — not a stripped-down minimalist version, but a fully realized one.

Wear it as something you'll notice every time you look down at your hand. The Katharine joins a Lisa Robin tradition of classic solitaire engagement rings designed to honor the form's history while making it meaningfully your own.

Design Process

The Lisa Robin Engagement Ring Design Experience

How your ring goes from your idea to the finished piece, with clarity at every step.

Online Ordering

Begin your custom engagement ring online, with guidance at each decision. Diamond shape guides, setting comparisons and education pages throughout the site help you understand every choice.

If you would like to personalize your design, place your order at any time. Lisa follows up to refine the details with you before anything is crafted.

Private Design Appointments

For a more collaborative experience, meet with Lisa one-on-one, in the studio or by Zoom. Your design appointment is shaped around you: Lisa guides each decision in real time as your diamond engagement ring takes shape.

Compare diamonds from trusted suppliers around the world through the Lisa Robin Global Diamond Collection.

Review available diamonds by shape, proportions and overall presence, and choose the one that suits your design, your priorities and your budget.

Lisa shows you how each diamond will sit in your setting, so the finished engagement ring feels balanced and intentional.

Natural and lab-grown diamonds are both available, so you can choose what feels right for you.

Before your ring is crafted, you review detailed CAD renderings made with your diamond's exact dimensions.

Multiple views let you see proportions, balance and design details, so you know how your engagement ring will come together before crafting begins.

If you add a wedding ring to the same order, the renderings show each ring on its own and both together, so you can see how they pair.

Once you approve your design, your ring is crafted by hand, made for you.

Your engagement ring is completed in 3 to 4 weeks after design approval.

Choose fully insured shipping or a private pickup at the studio. Lisa stays in touch at every stage, so you always know what comes next.

Couples Who Designed Their Engagement Rings With Lisa

I wanted a classic round engagement ring and this is perfect. I love the six-prong setting on the round diamond. Thank you for helping my fiancé select the perfect diamond and ring! This was perfect to add to my custom Lisa Robin wedding stack. I love it!

Mary Katherine & Adam
Nashville TN

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 & Zane
Blountville TN

Frequently Asked Questions About Classic Engagement Rings

A classic engagement ring features time-honored design elements—clean lines, refined proportions, and settings that center the diamond. Solitaires, halo designs, and three stone engagement rings all fall within the classic category.
Yes. Classic engagement rings solitaire designs remain some of the most requested styles because they highlight the beauty of the center diamond and pair effortlessly with wedding bands.
A halo encircles the diamond from above, creating a defined ring of brilliance. A hidden halo is placed beneath the center diamond, adding sparkle from the side profile while maintaining a clean classic silhouette.
The three stone engagement ring represents your past, present, and future together—making it both a classic design and one of the most meaningful settings available.
Platinum, white gold, and yellow gold are the most popular. Platinum offers strength and brightness, white gold delivers a sleek modern look, and yellow gold provides timeless warmth.
Absolutely. You can choose your diamond shape, modify proportions, select your preferred metal, or personalize details like pavé and prong style. Classic designs adapt beautifully to customization.
Yes. Most classic styles—solitaire, halo, and three stone—pair seamlessly with straight or contoured wedding bands, offering versatility for building a meaningful ring stack.

Yes. Every Lisa Robin ring carries a lifetime craftsmanship warranty against crafting defects. If a defect in how your ring was crafted appears at any time, we will repair or replace it, at our option, at no charge. It covers crafting defects only, not wear and tear, accidental damage, theft, or the loss of diamonds or gemstones not caused by a defect. For care beyond the warranty, the JM Care Plan is the lifetime service option.

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