Cushion Lab Grown Diamond Three Stone Engagement Ring (1.78 ct, Pear Sides)

IGI Report IncludedMade to OrderInsured Delivery

Cushion lab grown diamond three stone engagement ring in yellow gold

1 of 12

$748.00

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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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 · approx. 1.78 ct	Yes — 1 to 4.5 ct
Metal & Color	Every color shown	Yes — 11 options
Side diamonds	Two pear-shaped diamonds	Included as shown
Total diamond weight	Approx. 2.39 ct	Varies with selected center size
Stone Type	Lab Grown Diamond	Lab grown or natural

AT A GLANCE

A cushion Lab Grown Diamond three stone engagement ring from Signora Jewels.

Shown with an approximately 1.78 ct cushion center and two side diamonds in a classic prong setting.

Made to order in 11 metals: Sterling Silver, 9K, 14K and 18K gold in yellow, white or rose, plus Platinum.

Made to order — the price updates with your selection. Want something completely personal? Customize your jewelry here.

A beautifully balanced Lab Grown Diamond three stone engagement ring, this design places a brilliant cushion center between two elegant side diamonds that naturally draw the eye toward the center stone. The proportions create a graceful profile while allowing maximum light to reach every diamond.

At Signora Jewels, every ring is crafted individually after you place your order. Choose your preferred center diamond size and metal, and our artisans create the ring specifically for you, ensuring the proportions remain balanced across every size.

The gently rounded band keeps the focus on the center while the elevated basket allows light to enter from multiple angles, producing exceptional brilliance throughout the day.

Design Highlights

Classic three stone engagement ring design
Customizable center diamond from 1–4.5 ct
Elegant cushion center with side diamonds
Secure multi-prong setting
Comfort fit polished band
Made to order in 11 precious metal options
Ideal for engagements, anniversaries and milestone gifts

The beauty of a three stone design is its balance. The side diamonds enhance the center without overwhelming it, giving the ring impressive finger coverage while maintaining a timeless appearance.

Diamond & Ring Details

Specification	Details
Center Stone	Cushion · 7.00 × 7.00 mm · approx. 1.78 ct (shown)
Side Diamonds	2 Accent Diamonds · approx. 0.61 ct total
Total Weight	Approx. 2.39 ct
Setting	Prong-set Three Stone
Finish	High Polish
Occasion	Engagement • Anniversary • Bridal

Measurements are approximate. Final proportions vary according to the selected center diamond size.

About Lab Grown Diamonds

The cushion cut combines rounded corners with brilliant faceting, creating broad flashes of light and a soft romantic appearance that has remained a favorite for engagement rings for generations.

Every Signora Jewels diamond is lab grown—chemically, physically and optically identical to a mined diamond, graded by the same 4Cs, and offering exceptional beauty with a documented origin and no mining footprint.

Metal, Care & Fit

Choose from Sterling Silver, 9K, 14K or 18K gold in yellow, white or rose, or Platinum. Order your regular ring size; most precious metals can be resized if needed. Clean with warm water, mild soap and a soft brush, then store separately to preserve its finish.

FAQ

Can I choose a different center diamond size?
Yes. This ring is made to order with center sizes from 1 to 4.5 carats while maintaining balanced proportions.

Are lab grown diamonds real diamonds?
Yes. Lab grown diamonds are chemically, physically and optically identical to mined diamonds and are graded using the same standards.

What does a three stone engagement ring symbolize?
A three stone engagement ring traditionally represents the past, present and future of your relationship, making it a meaningful engagement choice.

What is the difference between 9K and 18K gold?
18K contains more pure gold and has a richer color, while 9K offers excellent durability for everyday wear.

Can the ring be resized later?
Most versions of this design can be professionally resized after purchase if your finger size changes.

How long does production take?
Every ring is individually made to order before shipping to ensure the highest quality and finish.

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