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Marquise|Lab Grown|IGI

2.57ct H VS1 Marquise Lab Grown Diamond

EX • H/VS1 • IGI LG840639322

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG840639322

Diamond specifications and retailer prices

From $660 USD
£519 GBP
As of November 1, 2026
Save $1,270 USD (66%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,930 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 2.57ct lab-grown marquise diamond

This 2.57ct lab-grown marquise sits in the two to three carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG840639322 or 840639322. Listed at 2 retailers as of October 31, 2026, with prices from $660 to $1,930, a $1,270 spread on the same certified stone. Brilliant Earth lists it at $1,930. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

2.57
Carat
H
Color
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840639322
Dimensions14.33 × 7.12 × 4.47 mm
L/W Ratio2.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.33 mm7.12 mm2.57 ctH / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840639322
Side View
Table 60.0%Crown 34.8°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: $1,930 USD|Low: $660 USD|High: $2,040 USD|Avg: $1,289 USD|-5.4%
Brilliant Earth
Retailer 2
November 1, 2026
Retailer 2$660 USD
Brilliant Earth$1,930 USD

17 data points across 2 retailers

2 retailers$660 USD to $1,930 USD

A
Cheapest Retailer
-
$660 USD
£519 GBP
Most Expensive
B+
Brilliant Earth
21613796A · Oct 31
$1,930 USD
View
1 more retailer has this diamond
Prices start from $660 USDSave up to $1,270 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
2.57ct Marquise
$660 USD