Lab Diamond Marquise

This collection holds loose marquise cut lab grown diamonds, sold one stone at a time. Each listing names the carat weight, color and clarity, so you can compare stones side by side before you choose one for a ring, pendant or pair of earrings. The range covers colorless stones from D to H color and fancy colored stones in pink, blue and orange-pink tones, and some listings are marked as IGI certified.

Why choose a marquise cut

The marquise is a long, boat-shaped brilliant with pointed ends. For its carat weight it shows a large face, and its length makes the finger look slimmer. Lab grown diamonds have the same chemical and optical properties as mined diamonds, so a marquise cut lab diamond gives the same sparkle and hardness.

How to choose a loose marquise lab diamond

Look at the outline first: both points should line up and the two sides should curve evenly. Many marquise stones show a darker "bow tie" across the middle, so compare photos and pick a stone where it is faint. Colorless D to F stones suit white gold, while G and H look warm and fit well in yellow or rose gold. When you are ready to set your stone, browse our marquise lab diamond rings or a classic lab diamond solitaire ring.

FAQs

Can I have a loose marquise diamond set in a ring?

Yes. Pick a stone here and a setting from our lab diamond engagement rings, and the ring is made to order around it.

How big will my marquise look?

See our diamond size chart for how different carat weights look on the hand.

Is a lab diamond the same as moissanite?

No. Read moissanite vs lab grown diamond for the differences.