Marquise|Lab Grown|IGI

4.30ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG833606493

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG833606493

Diamond specifications and retailer prices

From $544 USD
As of October 27, 2026
Save $5,946 USD (92%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,490 USD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 4.3ct lab-grown marquise diamond

This 4.3ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG833606493 or 833606493. Listed at 10 retailers as of October 27, 2026, with prices from $544 to $6,490, a $5,946 spread on the same certified stone. Brilliant Earth lists it at $6,490. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

4.30
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG833606493
Dimensions16.61 × 8.50 × 5.37 mm
L/W Ratio1.95
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.61 mm8.50 mm4.30 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG833606493
Side View
Table 60.0%Crown 35.4°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $6,490 USD|Low: $539 USD|High: $6,690 USD|Avg: $2,236 USD|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 8$544 USD
Retailer 2$566 USD
Retailer 7$609 USD
Retailer 4$1,021 USD
Retailer 6$1,741 USD
Retailer 5$1,745 USD
Retailer 10$1,774 USD
Retailer 9$2,716 USD
Retailer 3$2,819 USD
Brilliant Earth$6,490 USD

27 data points across 10 retailers

10 retailers$544 USD to $6,490 USD

A
Cheapest Retailer
-
$544 USD
A
Retailer 2
-
$566 USD
£446 GBP
View
A
Retailer 3
-
$609 USD
View
A
Retailer 4
-
$1,021 USD
€972 EUR
View
B
Retailer 5
-
$1,741 USD
View
B
Retailer 6
-
$1,745 USD
View
B+
Retailer 7
-
$1,774 USD
View
Retailer 8
-
$2,716 USD
SGD 3,670 SGD
View
Price last confirmed 16 days ago
B+
Retailer 9
-
$2,819 USD
£2,220 GBP
View
Most Expensive
B
Brilliant Earth
21148210A · Oct 28
$6,490 USD
View
9 more retailers have this diamond
Prices start from $544 USDSave up to $5,946 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
4.30ct Marquise
$544 USD