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Marquise|Lab Grown|IGI

0.51ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG542212263

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG542212263

Diamond specifications and retailer prices

From $124 USD
As of October 27, 2026
Save $828 USD (87%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,294 USD at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct lab-grown marquise diamond

This 0.51ct lab-grown marquise sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG542212263 or 542212263. Listed at 16 retailers as of October 27, 2026, with a 668% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.51
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.2°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG542212263
Dimensions8.94 × 4.17 × 2.47 mm
L/W Ratio2.14
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.94 mm4.17 mm0.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG542212263
Side View
Table 64.0%Crown 30.2°Girdle: MED-STKPavilion 41°Culet: NoneDepth 59.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $1,294 USD|Low: $73 USD|High: $1,302 USD|Avg: $386 USD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
October 29, 2026
Retailer 8$73 USD
Retailer 11$124 USD
Retailer 7$139 USD
Retailer 16$144 USD
Retailer 3$164 USD
Retailer 13$164 USD
Retailer 12$290 USD
Retailer 14$295 USD
Retailer 2$319 USD
Retailer 9$372 USD
Retailer 4$382 USD
Retailer 15$495 USD
Retailer 10$523 USD
Retailer 5$552 USD
Retailer 6$952 USD
MOH London$1,294 USD

42 data points across 16 retailers

16 retailers$124 USD to $952 USD

A
Cheapest Retailer
-
$124 USD
A
Retailer 2
-
$139 USD
View
Final sale: no returns
A
Retailer 3
-
$144 USD
View
A
Retailer 4
-
$164 USD
View
A
Retailer 5
-
$164 USD
View
B+
Retailer 6
-
$290 USD
View
B+
Retailer 7
-
$295 USD
View
B+
Retailer 8
-
$319 USD
£251 GBP
View
B+
Retailer 9
-
$333 USD
HK$2,600 HKD
View
B+
Retailer 10
-
$372 USD
£293 GBP
View
B
Retailer 11
-
$382 USD
View
B
Retailer 12
-
$495 USD
View
B
Retailer 13
-
$523 USD
View
B
Retailer 14
-
$552 USD
View
B
Retailer 15
-
$952 USD
View
Most Expensive
B
MOH London
LG542212263 · Oct 29
$1,294 USD
£1,019 GBP
View
Price under review
15 more retailers have this diamond
Prices start from $124 USDSave up to $828 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
0.51ct Marquise
$124 USD