Marina Marquise Cut Diamond Ring – Lab-Grown | 18K Yellow Gold
Made to order
IGI Certified
6 week lead time
Free, tracked shipping
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Behind the piece
Marina Marquise Cut Diamond Ring – Lab-Grown | 18K Yellow Gold
Every Una ring begins with a clear point of view and a commitment to craft. Yours is no exception.
Marina: Marquise Cut Lab-Grown Diamond Ring
Dramatic. Elegant. Unapologetically Bold.
The Marina is a striking marquise cut lab-grown diamond ring designed to turn heads. With its elongated silhouette and pointed tips, the marquise diamond maximizes brilliance and creates the illusion of longer, slender fingers. Crafted for those who embrace standout style with refined sophistication.
Hand-set in your choice of 18K gold or platinum, the Marina is ethically made to order and fully customizable—down to the carat size, metal, and personal engraving.
Features:
- Marquise cut lab-grown diamond (elongated with pointed ends)
- 58 facets to enhance brilliance and light reflection
- Carat range: Choose from 1.0 to 5.0 carats
- Internally flawless and IGI certified
- Custom engraving included at no extra cost
- 18K solid gold (yellow, white, rose) or platinum band
- Designed and made to order for a sustainable future
Customize Your Marina:
- Choose your diamond size: 1.0–5.0 carats
- Select your metal: 18K yellow gold, white gold, rose gold, or platinum
- Add your personal engraving for free
- Handcrafted to order in Australia and shipped globally
Why Marina?
The Marina is for the modern romantic with bold taste. Whether you're marking a milestone or searching for a one-of-a-kind ethical engagement ring, this marquise cut dazzler delivers high-impact glamour, without compromise.
Design your Marina today, choose your carat, select your metal, and make it unmistakably yours.
Sustainable. Iconic. Made for you.
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.