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Marquise|Lab Grown|IGI

4.51ct G VS2 Marquise Lab Grown Diamond

EX • G/VS2 • IGI LG683596148

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG683596148

Diamond specifications and retailer prices

From $1,161 USD
As of November 2, 2026
Save $222 USD (16%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $3,388 USD at MOH London · As of October 25, 2026
View at MOH London

About this 4.51ct lab-grown marquise diamond

This 4.51ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG683596148 or 683596148. Listed at 6 retailers as of November 2, 2026, with a relatively tight 19% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

4.51
Carat
G
Color
VS2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG683596148
Dimensions17.53 × 8.50 × 5.21 mm
L/W Ratio2.06
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
17.53 mm8.50 mm4.51 ctG / VS2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG683596148
Side View
Table 58.0%Crown 35.8°Girdle: STK-THKPavilion 38.9°Culet: NoneDepth 61.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: $3,388 USD|Low: $1,117 USD|High: $3,748 USD|Avg: $1,962 USD|-8.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 3$1,161 USD
Retailer 4$1,218 USD
Retailer 6$1,271 USD
Retailer 2$1,383 USD
Retailer 5$3,083 USD
MOH London$3,388 USD

42 data points across 6 retailers

6 retailers$1,161 USD to $1,383 USD

A
Cheapest Retailer
-
$1,161 USD
A
Retailer 2
-
$1,218 USD
View
B+
Retailer 3
-
$1,271 USD
View
A
Retailer 4
-
$1,383 USD
£1,089 GBP
View
Retailer 5
-
$3,083 USD
View
Price last confirmed 15 days ago
Most Expensive
MOH London
LG683596148 · Oct 25
$3,388 USD
£2,668 GBP
View
Price last confirmed 8 days ago
5 more retailers have this diamond
Prices start from $1,161 USDSave up to $222 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
4.51ct Marquise
$1,161 USD