Cushion Cut Lab Grown Diamond Engagement Ring
Cushion engagement rings, set with GIA-certified lab-grown diamonds in 18K solid gold. Anyone who wants a softer, more romantic alternative to a princess or radiant.
18K 3ct Cushion Cut Lab Grown Diamond Side Stone Engagement Ring
18K 3.5ct Cushion Cut Lab Grown Diamond Side Stone Engagement Ring
18K 3ct Cushion Cut Lab Grown Diamond Solitaire Engagement Ring
18K 2.44ct Cushion Cut Lab Grown Diamond Three Stone Engagement Ring
18K 3ct Cushion Cut Lab Grown Diamond Solitaire Engagement Ring
18K 2.5ct Pear Shaped Lab Grown Diamond Three Stone Engagement Ring
18K 2ct Cushion Cut Lab Grown Diamond Solitaire Engagement Ring
18K 1ct Cushion Cut Lab Grown Diamond Solitaire Engagement Ring
18K 1.21ct Cushion Cut Lab Grown Diamond Solitaire Engagement Ring
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A cushion engagement ring is the right choice when anyone who wants a softer, more romantic alternative to a princess or radiant. The shape sets the entire visual character of the ring, and the cushion is one of the most distinctive choices you can make.
A cushion cut is a square or rectangular diamond with rounded corners and large facets. The result is a pillow-soft silhouette with the brilliance of a modern brilliant cut. It carries a slight vintage feel without reading as old. Anyone who wants a softer, more romantic alternative to a princess or radiant.
Best settings for a cushion centre stone
Four corner prongs hold a cushion securely without obstructing the stone face. A solitaire lets the cushion do everything; a halo adds a frame of smaller diamonds and makes the centre look 25–30% larger; a three stone setting flanks the centre with two accent diamonds.
What to expect on the finger
A 1 ct cushion is about 5.5 × 5.5mm and looks slightly smaller than a round of the same weight. Most Riyanika customers choose between 1 ct and 2 ct for a cushion centre. Lab-grown diamonds give you the same brilliance as a mined diamond at roughly 40–60% of the price, which means you can comfortably size up the centre stone.
Lab-Grown Diamond centre stones
Every centre stone above 0.30 ct is GIA-certified and laser-inscribed with its grading report number. Every ring is built in 18K solid gold (yellow, white or rose), hand-finished and hallmarked in our workshop. For the full lab-grown diamond engagement ring range across all shapes, see our main lab-grown diamond engagement ring collection.
What comes with the ring
The original GIA grading report, a formal appraisal for insurance, one free resize within 60 days, and lifetime cleaning and prong checks. Every ring ships in a signature Riyanika box.
Bespoke
Not seeing the exact combination you want? Every Riyanika engagement ring can be made bespoke at no extra cost. Start your design here and we will send a CAD render for your approval before any gold is cut.
Frequently Asked Questions
How big does a 1 ct cushion diamond look?
A 1 ct cushion is about 5.5 × 5.5mm and looks slightly smaller than a round of the same weight. On an average size 6 finger this reads as a confident, well-proportioned centre stone.
Is a cushion diamond more expensive than a round?
Round brilliants typically cost 15–25% more than fancy shapes (oval, emerald, pear, cushion, etc.) at the same carat weight and grade. The premium reflects how much rough diamond is wasted to cut a round vs a fancy shape.
What setting works best with a cushion cut?
Four corner prongs hold a cushion securely without obstructing the stone face. A solitaire is the most popular for letting the shape speak for itself; a halo is the most popular for making the centre look larger.
Are lab-grown diamond cushion diamonds GIA-certified?
Every centre stone above 0.30 ct is GIA-certified and laser-inscribed with its grading report number.
Can I customise this ring?
Yes. Every Riyanika engagement ring can be made bespoke at no extra cost on most designs. We will send a CAD render before any gold is cut.
How do I care for a cushion engagement ring?
Clean at home once a month with warm water, mild washing-up liquid, and a soft toothbrush. Bring the ring in once a year for a professional clean and prong check (free for life at Riyanika). Take the ring off for the gym, swimming, and gardening.