Cushion Cut Three Stone Lab Grown Diamond Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

Diamond ring with gold and silver band on a white background

1 of 13

$904.00

Price updates with your selections

Independently graded by IGI IGI Report Included Selected 0.50 ct+ lab-grown center or primary diamond · IGI grading report · Signora Jewelry Certificate included. 1 ct lab-grown diamond · IGI report · Signora Certificate included.

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Metal:

Center Diamond:

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Forever, A & J

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Complimentary · hand-engraved to order · adds about 3–4 days.

Estimated dispatch: 7 business days Duties & taxes prepaid

Ring size guide

Lay a ring you own flat on the circle and slide until it sits just inside it — or set its inner diameter directly.

Measure the inside of a ring that already fits — inner edge to edge — with a ruler in mm, then set it below. No ring handy? Try Measure your finger.

14 mm 24 mm 17.3 mm

Inner diameter mm

US size

UK size

EU size

Circumference

54.3 mm

Between sizes? Always choose the larger size. Fingers are slightly bigger in the evening — measure then for the best fit.

Method 1 — Use an existing ring

Find a ring that fits the intended finger comfortably.
Place it flat and measure the inner diameter (inside edge to inside edge) in mm.
Enter that measurement in the Measure a ring tab.

Method 2 — Wrap and measure

Wrap a thin strip of paper around the base of your finger.
Mark where it overlaps — measure that length in mm (your circumference).
Divide by 3.1416 (π) to get your diameter, then use the Measure a ring tab.

Tip: Middle finger sizes typically run half a size larger than the ring finger. If between sizes, go up. Measure in the evening — fingers are slightly larger then.

7US size

US	UK	EU	Diameter	Circumference

Highlighted row = your converted size. Most common women's sizes are US 6–7. All measurements in mm.

Selected: —

The Signora Promise

Hand-finished in SuratMade to order

Reports where statedExact scope shown

Insured deliverySigned & tracked

Secure checkoutShopify checkout

Standard-design returns30-day eligibility

Final inspectionChecked before dispatch

About This Ring

Cushion Cut · Three Stone

Center

Cushion Cut

Carat

1 ct

Customizable

Metal

Customizable

Setting

Three Stone

An independent IGI grading report is included when the selected individual lab-grown center or primary diamond is 0.50 ct or larger.

Each metal color is shown in the photos — pick your center size and metal in the options on this page.

Detail	In the photos	Customizable
Center diamond	Cushion · 3.19 ct	Yes — 1 to 4.5 ct
Metal & color	Every color shown	Yes — 11 options
Side stones	2 diamonds · approx. 0.66 ct	Included as shown
Total diamond weight	Approx. 3.84 ct	Varies with center size
Stone type	Lab Grown Diamond	Lab grown or natural

Made to order — the price updates with your selection. Want fully bespoke?
Customize your jewelry here.

A cushion lab grown diamond engagement ring brings together soft curves, broad flashes of light, and a presence that feels both romantic and substantial. This three-stone design centers a beautifully proportioned cushion-cut diamond framed by tapered baguette side stones that naturally draw the eye toward the center.

The combination of a large cushion center and sleek custom baguette accents creates a balanced silhouette with a refined architectural feel. From every angle, the open basket allows light to enter the stones, enhancing brilliance while keeping the profile elegant and airy.

Made to order in your chosen metal and center size, this design offers the look of a luxury bespoke engagement ring while giving you the flexibility to create a piece that reflects your story and style.

Design highlights

Cushion-cut lab grown diamond center stone
Three-stone engagement ring design
Two custom tapered baguette side diamonds
Elegant four-prong center setting
Open gallery allows maximum light return
Clean, sophisticated profile with architectural lines
Available in 11 precious metal options
Center stone customizable from 1 CT to 4.5 CT

The broad cushion center delivers soft, romantic brilliance while the tapered baguettes add structure and balance. Together they create a three-stone ring that feels both timeless and distinctly modern.

Diamond Details

Specification	Details
Center Stone Shape	Cushion Cut
Center Stone Size	8.50 × 8.50 mm
Center Stone Weight (as shown)	Approx. 3.19 CT
Side Stones	2 Custom Baguette Diamonds · Approx. 0.66 CT Total
Total Diamond Weight	Approx. 3.84 CT
Total Diamond Count	3
Stone Type	Lab Grown Diamond
Setting	Four-Prong Three Stone Setting

Measurements are approximate; your chosen size sets the final center weight.

Ring Specifications

Feature	Details
Ring Style	Three Stone
Metal Options	Silver, 9K, 14K, 18K Gold, Platinum
Available Colors	Yellow Gold, White Gold, Rose Gold, Silver, Platinum
Setting Type	Four-Prong Three Stone
Finish	High Polish
Occasion	Engagement, Anniversary, Bridal

About Lab Grown Diamonds

A cushion's pillow outline and rounded corners give a softer, warmer glow, with larger facets that scatter light in broad flashes. It pairs naturally with vintage, halo, and three-stone designs and wears gently against the skin.

Every Signora Jewels diamond is grown in a controlled lab using the CVD process, producing a stone that is chemically, optically, and physically identical to a mined diamond — same hardness, same fire, graded on the same 4C scale. Because the supply chain is short and traceable, you get a larger, cleaner stone for the same budget and a documented origin, with no mining footprint. The result is a diamond that looks and tests exactly as a natural one, with more carat and clarity for your money.

FAQ

Can I change the center stone size?
Yes. Center sizes from 1 CT to 4.5 CT are available, and the setting is scaled to suit the stone you choose.

Are lab grown diamonds real diamonds?
Yes. They are chemically, physically, and optically identical to mined diamonds and are graded on the same 4C scale.

Will a lab grown diamond last a lifetime?
Yes. Lab grown diamonds are a 10 on the Mohs hardness scale and are suitable for everyday wear.

What do the side stones add?
The tapered baguette diamonds frame the center stone, adding balance, finger coverage, and elegant architectural detail without overpowering the cushion center.

Which metals can I choose?
Silver, 9K / 14K / 18K gold in yellow, white or rose, and Platinum.

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