18K Gold Lab Grown Diamond Oval Cut Engagement Ring

Product Description

Premium 18K solid gold ring featuring a brilliant oval-cut lab grown diamond. GRA certified, hypoallergenic, and available in yellow, white, and rose gold. A flagship piece for high-end bridal boutiques.

Solid 18K gold: what the weight actually costs you

A size 6 oval ring in this design weighs 3.1 to 3.4 grams of 18K, and that weight is roughly 70 percent of the material cost before any stone is set. This is why two quotes for the same photo can differ by 40 percent: one is solid 18K at 3.3 grams, the other is a hollowed shank at 2.4 grams that will dent at the bottom of the band within a year of daily wear.

Ask for the gram weight in writing on every quote. A hollow shank saves the factory USD 12 to 18 per piece and costs your customer a resizing charge later, because a hollow band cannot be stretched more than half a size without collapsing.

Why an oval at 1.4 to 1 ratio

Oval cuts are about proportion, not size. A 1.4 to 1 length to width ratio gives the elongated look that photographs as a larger stone on the hand, while a 1.6 to 1 oval starts to read as narrow and dated on a size 5 finger.

We cut ovals from 8.3 by 6.0 mm at 1.5 ct up to 10.5 by 7.5 mm at 3.0 ct, and hold the ratio inside plus or minus 3 percent per batch. If your size run is mostly US 4 to 6, ask for the shorter ratio; the same carat weight looks wider and more balanced on a narrow hand.

What a GRA card tells you and what it does not

GRA is an authenticity card issued with lab grown stones. It carries the carat weight, color grade, clarity grade and a card number, and it matches a laser inscription on the girdle in most cases. It is not a laboratory grading report, and it does not include cut grade, polish or symmetry measurements.

That matters for a bridal program. Two stones both sold as D VVS1 can differ noticeably in brightness because one has a shallow pavilion. If brightness consistency across a 20 piece run is part of your promise, move this design to the IGI certified version of the same ring and budget the difference.

Order structure and pricing

Quantity	0.5 - 1.0 ct	1.5 - 3.0 ct
10 to 24 pieces	USD 120 - 165	USD 178 - 240
25 to 49 pieces	USD 112 - 152	USD 165 - 224
50 pieces and up	USD 104 - 142	USD 154 - 208

Prices move with gold spot and with stone size, so quotes are valid 15 days. MOQ is 10 pieces per size and metal color, and mixed sizes inside one order are allowed above 30 total pieces.

Inspection on arrival for solid gold bridal

• Weigh five rings from the batch, expect 3.1 to 3.4 g at size 6 in 18K
• Check the inside stamp for 18K or 750, an unstamped ring complicates resale and repair
• Verify the GRA card number against the girdle inscription under 10x magnification
• Set the ring on a flat surface and press the shank, any spring means a hollow band

Lead time and what delays it

Standard production runs 18 to 25 days after deposit, because solid gold rings are cast, not stamped, and each size needs its own mold. Two things push that out: a stone change after sampling adds 6 to 9 days, and a plating or rhodium request on white gold adds 3 days at the finishing stage.

Yellow and rose gold need no rhodium and ship on the shorter end. White 18K always needs rhodium, so book white gold programs first if your launch date is fixed.

Buyer Questions

Can you supply the same design in 14K to hit a lower price point?

Yes, and 14K saves roughly 12 to 16 percent on the gold line. The trade-off is color depth: 14K yellow reads slightly paler than 18K and wears to a duller tone sooner. For a boutique program, 18K holds its color through resale and appraisal.

Is the lab grown diamond graded by a lab or only carded?

This version ships with a GRA authenticity card. If you need independently graded stones, order the IGI certified round version, which carries a report number you can verify on the IGI site.

Do you offer matching wedding bands in the same profile?

Yes, a 2.2 mm plain or pavé band in the same 18K color, priced USD 78 to 135 depending on melee count. Order bands with the rings so the profile and color come from the same gold lot.

Related reading

To see how this price is built, read the five cost lines behind a wholesale ring quote.

For planning around Chinese New Year and peak season, read the order calendar that avoids air freight.