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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 $435 AUD
$305 USD
As of November 2, 2026
Save $1,729 AUD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,164 AUD 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 November 1, 2026, with prices from $435 to $2,164, a $1,729 spread on the same certified stone. MOH London lists it at $2,164. 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
Colour
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: Nov 2
Current: $2,164 AUD|Low: $418 AUD|High: $2,189 AUD|Avg: $1,070 AUD
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$435 AUD
Retailer 9$457 AUD
Retailer 3$488 AUD
Retailer 8$491 AUD
Retailer 15$505 AUD
Retailer 12$539 AUD
Retailer 16$539 AUD
Retailer 5$763 AUD
Retailer 14$880 AUD
Retailer 2$987 AUD
Retailer 6$1,062 AUD
Retailer 10$1,659 AUD
Retailer 13$1,735 AUD
Retailer 4$2,047 AUD
MOH London$2,164 AUD
Retailer 7$2,169 AUD

25 data points across 16 retailers

12 retailers$435 AUD to $2,164 AUD

A
Cheapest Retailer
-
$435 AUD
$305 USD
A
Retailer 2
-
$457 AUD
$320 USD
View
B+
Retailer 3
-
$488 AUD
$342 USD
View
Final sale: no returns
B+
Retailer 4
-
$505 AUD
$354 USD
View
Retailer 5
-
$539 AUD
$378 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$539 AUD
$378 USD
View
B
Retailer 7
-
$880 AUD
$617 USD
View
B
Retailer 8
-
$987 AUD
€659 EUR
View
B
Retailer 9
-
$1,659 AUD
$1,163 USD
View
B
Retailer 10
-
$1,735 AUD
$1,216 USD
View
B
Retailer 11
-
$2,047 AUD
$1,434 USD
View
Most Expensive
B
MOH London
LG436047203 · Nov 1
$2,164 AUD
£1,194 GBP
View
11 more retailers have this diamond
Prices start from $435 AUDSave up to $1,729 AUD

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
$435 AUD