The Marina Marquise-Cut Diamond Ring – Lab-Grown | 18K Gold or Platinum
Made for you, not a shelf
IGI Certified Diamond
Ready in ~6 weeks
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Each ring is handcrafted once you order. No stock. No shortcuts. Just yours.
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Behind the piece
The Marina Marquise-Cut Diamond Ring – Lab-Grown | 18K Gold or Platinum
Every Una ring begins with a clear point of view and a commitment to craft. Yours is no exception.
The Marina is a marquise-cut lab-grown diamond ring, pointed at both ends with a long curved silhouette. It sits along the finger rather than across it. Made by hand to order in solid 18K gold or platinum.
Set with an IGI certified lab-grown marquise diamond. Grown in a lab, not dug out of the ground. Every grade is on the certificate: cut, colour, clarity and carat.
Specifications
- Diamond: Lab-grown (lab-created), IGI certified
- Shape: Marquise cut
- Setting: Solitaire with protective tip claws
- Metal: 18K yellow, white or rose gold, or 950 platinum
- Carat: 1ct to 5ct, chosen at checkout
- Engraving: Complimentary
- Made to order: Six weeks from order to delivery
- Designed in Australia
The marquise cut
A long, narrow shape with a point at each end. The points are the vulnerable part, so they need claws over them, and we fit those as standard on The Marina. Cut quality varies more on a marquise than on most shapes. Ratio and tip sharpness both change how the finished ring reads, and we select for both.
Lab-created marquise diamond rings in Australia
The Marina is made to order at Una Diamond in Sydney. We source IGI certified lab-grown marquise diamonds across a range of carat weights, so you can pick the stone size that suits your hand. Browse our marquise-cut engagement rings, solitaire diamond rings, and pear-shaped engagement rings.
create your own
The Una ring builder
Create the ring that feels like you. Our Ring Builder lets you choose your diamond, metal and proportions with total clarity, guided by the same design principles we use in-house.
ready to wear
Our signature pieces
From delicate pavé bands to bold diamond staples, each Una design begins with a clear point of view: modern, refined, and made to be worn every day. Every piece is crafted with lab-grown diamonds, ensuring beauty with purpose.
una x forever projects
Designed with care, backed by purpose
We’ve partnered with Forever Projects as part of our 1% Pledge. That means every single Una Diamond purchase contributes to life-changing programs for mothers and children.