Heart Shaped Lab Grown Diamonds
A brilliant-cut heart — romantic and unmistakable, where symmetry is everything.
What is a heart shaped diamond?
A heart shaped diamond is a modified brilliant cut — essentially a pear with a cleft at the top, faceted for full, fiery sparkle. It's the most overtly romantic of all the shapes, which makes it a favourite for engagement rings, pendants, and anniversary pieces.
Symmetry is everything
A heart lives or dies on its symmetry. The two lobes should match, the cleft should be sharp and centred, and the point should line up directly below it. When choosing, look for a balanced, even outline — a lopsided heart is obvious, while a symmetrical one reads instantly as a heart from across the room.
What to look for in a heart shape
- Symmetry — even lobes, a defined cleft, and a point aligned to the centre.
- Size — hearts read most clearly at around half a carat and up; smaller can look ambiguous in a setting.
- Ratio — roughly 0.90–1.10 (close to square) keeps the classic heart look.
Use the filters above to set carat, colour, and clarity.
Heart shaped engagement rings
A three-prong setting (one prong at the point, two cradling the lobes) protects the shape, and a halo can emphasise the outline. Choose your loose stone here, then build it into the ring of your choice.
Ready for a setting? Explore our Heart engagement rings.
Why buy a heart shaped diamond from Stienhardt
Every Stienhardt heart is independently certified by IGI or GIA, graded for the full 4Cs, and conflict-free — all backed by free 30-day returns.
Heart Cut Lab Grown Diamonds — frequently asked questions
What is a heart shaped diamond?
A modified brilliant cut — essentially a pear with a cleft at the top — faceted for full sparkle and an unmistakably romantic look.
What makes a good heart shaped diamond?
Symmetry. The two lobes should match, the cleft should be sharp and centred, and the point should align directly below the cleft.
What carat size is best for a heart shape?
Hearts read most clearly at about half a carat and up; very small hearts can look ambiguous once set.
What length-to-width ratio is best for a heart?
Roughly 0.90–1.10 (close to square) keeps the classic, balanced heart look. Higher ratios look longer and narrower.
Are heart shaped lab grown diamonds real diamonds?
Yes — they're real diamonds, chemically and optically identical to mined stones, and recognized as diamonds by the FTC.
Are heart shaped lab grown diamonds certified?
Yes. Every Stienhardt heart is independently certified by IGI or GIA and graded for the full 4Cs.
Do heart shaped diamonds sparkle a lot?
Yes — they're a brilliant cut, so they're very sparkly, with the bonus of a romantic, distinctive shape.
What setting suits a heart shaped diamond?
A three-prong setting protects the point and lobes; a halo can emphasise the heart outline.
Can I set a heart shaped diamond into an engagement ring?
Absolutely. Choose your loose stone, then pick a setting and we'll mount it for you.
What is your return policy?
Free 30-day returns on diamonds and jewelry.