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Marquise|Lab Grown|IGI

0.51ct H SI1 Marquise Lab Grown Diamond

ID • H/SI1 • IGI LG436047203

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG436047203

Diamond specifications and retailer prices

From $426 CAD
$305 USD
As of October 30, 2026
Save $1,692 CAD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,118 CAD at MOH London · As of November 1, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436047203 or 436047203. Listed at 12 retailers as of October 30, 2026, with prices from $426 to $2,118, a $1,692 spread on the same certified stone. MOH London lists it at $2,118. 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
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.3°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436047203
Dimensions7.72 × 4.22 × 2.68 mm
L/W Ratio1.83
Girdle conditionFaceted
Culet sizePointed
Top View
7.72 mm4.22 mm0.51 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG436047203
Side View
Table 58.0%Crown 36.3°Girdle: STK-THKPavilion 40.8°Culet: NoneDepth 63.5%

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 30
Current: $2,118 CAD|Low: $409 CAD|High: $2,143 CAD|Avg: $1,048 CAD
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
November 1, 2026
Retailer 11$426 CAD
Retailer 9$447 CAD
Retailer 3$478 CAD
Retailer 8$481 CAD
Retailer 15$495 CAD
Retailer 12$528 CAD
Retailer 16$528 CAD
Retailer 5$747 CAD
Retailer 14$862 CAD
Retailer 2$967 CAD
Retailer 6$1,039 CAD
Retailer 10$1,625 CAD
Retailer 13$1,699 CAD
Retailer 4$2,004 CAD
MOH London$2,118 CAD
Retailer 7$2,124 CAD

25 data points across 16 retailers

12 retailers$426 CAD to $2,118 CAD

A
Cheapest Retailer
-
$426 CAD
$305 USD
A
Retailer 2
-
$447 CAD
$320 USD
View
B+
Retailer 3
-
$478 CAD
$342 USD
View
Final sale: no returns
B+
Retailer 4
-
$495 CAD
$354 USD
View
Retailer 5
-
$528 CAD
$378 USD
View
Price last confirmed 7 days ago
B+
Retailer 6
-
$528 CAD
$378 USD
View
B
Retailer 7
-
$862 CAD
$617 USD
View
B
Retailer 8
-
$967 CAD
€659 EUR
View
B
Retailer 9
-
$1,625 CAD
$1,163 USD
View
B
Retailer 10
-
$1,699 CAD
$1,216 USD
View
B
Retailer 11
-
$2,004 CAD
$1,434 USD
View
Most Expensive
B
MOH London
LG436047203 · Nov 1
$2,118 CAD
£1,194 GBP
View
11 more retailers have this diamond
Prices start from $426 CADSave up to $1,692 CAD

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
$426 CAD