20 Carat Emerald Cut Lab Grown Diamond Engagement Ring in 18K White Gold

What Is a 20 Carat Emerald Cut Lab Grown Diamond Engagement Ring?

This is a solid 18K white gold emerald cut lab grown diamond engagement ring built around a 20.06 carat center stone measuring 18.16 by 12.73 by 8.29 mm. The center diamond grades D color and VVS2 clarity. It is compass set on four double claw prongs, with a further 65 round accent diamonds, 0.97 carat in total, along the basket rail and the shank.

Product type

Compass set emerald cut engagement ring with pave shank

Metal

Solid 18K white gold, hallmarked Au 750, 4.13 g

Center stone

20.06 ct lab grown emerald cut diamond, D color, VVS2 clarity

Center measurements

18.16 x 12.73 x 8.29 mm

Setting

Compass set, four double claw prongs at north, south, east and west

Accent diamonds

65 round lab grown diamonds, 0.97 ct total (36 at 1.10 mm, 29 at 1.80 mm)

Band

2.2 mm wide, 1.7 mm thick

Certification

IGI report LG754505553, issued for the center diamond

At 18.16 mm end to end, the center stone spans most of the finger between the knuckles, so this reads as a statement proposal ring rather than an everyday solitaire. Within our engagement rings collection it sits at the top of the carat range, for a buyer who wants that scale without stepping outside a certified single stone design.

What Is a Compass Setting, and Why Does a Stone This Size Need One?

A compass setting places the prongs at the four compass points, north, south, east and west, at the middle of each side rather than on the diagonal corners. On an emerald cut that is a structural decision, not a styling one. The corners of a step cut are its thinnest and most exposed facets, and a conventional corner claw mounting puts metal directly on them: protective, but it also covers the corner and breaks the outline face-up. Compass set claws leave all four corners clear, so the stone reads as a complete rectangle from above.

Each of the four claws is doubled, splitting into two narrower fingers where it meets the crown. At 20.06 carats the diamond carries roughly four grams of mass sitting high above the finger, and it behaves like a lever, so every knock is multiplied by the height of the setting before it reaches the metal. Two narrow contact points spread that load across more surface than one wide claw, and take less of the stone’s face while doing it.

A continuous rail of pave diamonds follows the outline of the basket just below the girdle, so the profile view shows a bright line under the stone instead of a plain metal wall. The shank measures 2.2 mm across and 1.7 mm through, kept deliberately narrow so the proportion stays with the center stone. Inside the band, the Au 750 hallmark confirms solid 18K gold rather than plated or filled metal.

Full rotation on video. The claws stay at the middle of each side, so the four corners of the step cut are never covered.

Materials & Craft

What Metal and Diamonds Are Used?

The ring is made in solid 18K white gold with a finished weight of 4.13 grams. In its raw alloy state 18K white gold is a pale warm color rather than bright white, which is why the head looks faintly yellow on the bench; the finished ring is rhodium plated to reach the white surface you see in the photographs. Both the center stone and the accents are lab grown diamonds. The 20.06 carat center is certified by IGI under report LG754505553: D color, VVS2 clarity, Excellent polish, Excellent symmetry, no fluorescence, grown by chemical vapor deposition and recorded as Type IIa. Accent diamonds at this size are not issued individual IGI reports, so they are covered by a diamond inspection certificate supplied with the finished ring.

• ◆ Each prong seat is cut and finished by hand so the claw sits flush against the crown facet with no gap under the metal
• ◆ The pave rail is set stone by stone along the curved basket edge, then the beads are trimmed back so the metal reads as a thin bright line
• ◆ Accent diamonds are matched for size and color against the D center before setting, so the shank does not read warm next to the crown
• ◆ Every finished ring is checked for prong contact, rail alignment and stone security before it leaves the production floor