Guides

Hearts & Arrows Lab Grown Diamond

Hearts & Arrows lab grown diamonds reveal flawless symmetry and unrivalled sparkle, each precision-cut to reflect light with extraordinary brilliance. More than a mark of exceptional craftsmanship, their perfect pattern holds a deeper meaning — symbolising love, balance, and unity in every facet.

Other gemstone guides

Hearts and Arrows cut lab-grown diamond showcasing ideal symmetry and light performance.

What are Hearts & Arrows diamonds?

Hearts & Arrows diamonds are the ultimate expression of precision cutting. When viewed under special magnification, they reveal a perfect optical pattern — eight symmetrical hearts from the pavilion (bottom) and eight arrows from the crown (top). But this brilliance doesn’t happen by chance.

To display this rare effect, a diamond must be cut with extraordinary accuracy — with every angle, proportion, and facet perfectly aligned. While all round brilliant diamonds sparkle, only a tiny percentage meet the strict criteria to become Hearts & Arrows, transforming a beautiful cut into an exceptional one.

The result? Unrivalled fire, brilliance, and symmetry — and a diamond that’s as meaningful as it is mesmerising.

What makes hearts & arrows diamond different?

More than diamonds, Hearts & Arrows celebrate light, love, and perfection. Often representing around 1% or less of cut diamonds, this rare selection means more. Crafted with IGI-recognised optical symmetry, these stones embody beauty that shines with both artistry and meaning.

01 Radiance

Precision that shines

The Hearts & Arrows pattern isn’t just beautiful — it’s a proof of superior cut quality. While carat, colour, and clarity all play a role in a diamond’s beauty, the cut determines how well it reflects light. A perfectly cut Hearts & Arrows diamond delivers exceptional fire, brilliance, and scintillation, ensuring your stone sparkles from every angle.

Round brilliant cut diamond held in tweezers, sparkling on white fabric.

02 Promise

Symbolism in every facet

The perfect symmetry of the Hearts and Arrows is more than a technical achievement — it’s a powerful symbol of love, balance, and unity. It makes these diamonds a meaningful choice for engagement rings and treasured keepsakes alike.

Hearts and Arrows diamond pattern diagram showing ideal cut symmetry for lab-grown diamonds.

03 Confidence

Certified perfection

Every Keanis Hearts & Arrows lab diamond is IGI-certified, with the Hearts & Arrows designation clearly indicated on the certificate. This mark confirms the precision of its cut, giving you complete confidence in both its quality and authenticity.

heart-and-arrow-igi-certificate-572x760 IGI Laboratory Grown Diamond Report. "Hearts & Arrows" ideal cut, 1.00 Carat, Internally Flawless, D color round brilliant.

Exceptional brilliance

Precision cut for maximum sparkle.
Meaningful design

Symbolises harmony and everlasting love.
Ethically created

Lab grown for minimal environmental impact.
Certified quality

Backed by IGI Hearts & Arrows report.

Diamond grading report: showing proportions, clarity characteristics and key to symbols from IGI.org.

Hearts & Arrows Diamonds — curated by Keanis

Perfectly cut, brilliantly symbolic

More about Hearts & Arrows lab diamonds

Before a diamond is mounted, the Hearts & Arrows pattern can be seen using a special optical viewer.
- From the top, you’ll see a symmetrical pattern of arrows.
- From the bottom, perfectly formed hearts appear.

Once the diamond is set in a ring, only the arrows may remain visible through careful inspection. If you're curious, we’re happy to show you the pattern before setting or share viewer images on request.
No — to exhibit the precise Hearts & Arrows pattern, a diamond must be cut as a standard round brilliant with exactly 57 or 58 facets. Other shapes (such as oval, emerald, or pear cuts) do not have the symmetrical facet arrangement required to display the optical pattern of hearts and arrows.
Not quite — Hearts & Arrows diamonds are round brilliant cuts, but they belong to a rare category where precision reaches a higher level. To reveal the distinctive hearts and arrows pattern, a diamond must not only have exceptional symmetry and polish, but also fall within very specific ranges of angles, proportions, and facet alignment.
These exacting standards go beyond standard "excellent" or "ideal" cut grades, transforming a classic round brilliant into a visibly superior diamond — one that reflects light with perfect harmony and sparkles from every angle.
Yes. Each Hearts & Arrows lab-grown diamond at Keanis is IGI-certified, and the certificate includes a specific Hearts & Arrows designation if the pattern meets IGI’s standards.
See how IGI defines and inspects Hearts & Arrows:
🔗 Learn more from IGI
🔗 IGI Hearts & Arrows Report
Hearts & Arrows diamonds are exceptionally rare — only a small percentage of round brilliant diamonds meet the strict criteria for this optical pattern. Achieving it requires master-level craftsmanship, precise proportions, and perfect facet alignment. The cutting process is not only more complex and time-consuming, but also results in greater material loss. Not every cutter can achieve this level of precision, which is why these diamonds command a premium. In return, you receive a stone that outshines others in brilliance, balance, and deeper symbolic beauty.
Most of our engagement rings can be crafted with a Hearts & Arrows lab-grown diamond. While this option isn’t shown on our other jewellery product pages, we’re always happy to personalise existing designs using these exceptional stones. Hearts & Arrows diamonds can be used in many pieces — including necklaces and earrings — where the design allows. If you're interested in adding one to a particular style, simply contact us and we’ll guide you through the options.