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Marquise|Lab Grown|IGI

0.51ct I SI1 Marquise Lab Grown Diamond

VG • I/SI1 • IGI LG440010794

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG440010794

Diamond specifications and retailer prices

From $486 NZD
$274 USD
As of November 2, 2026
Save $1,945 NZD (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,431 NZD 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG440010794 or 440010794. Listed at 10 retailers as of October 29, 2026, with prices from $486 to $2,431, a $1,945 spread on the same certified stone. MOH London lists it at $2,431. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle30.7°
Pavilion angle42.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440010794
Dimensions7.78 × 4.31 × 2.68 mm
L/W Ratio1.81
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.78 mm4.31 mm0.51 ctI / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG440010794
Side View
Table 61.0%Crown 30.7°Girdle: THN-STKPavilion 42.6°Culet: NoneDepth 62.2%

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: Nov 2
Current: $2,431 NZD|Low: $467 NZD|High: $2,449 NZD|Avg: $1,118 NZD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 7$486 NZD
Retailer 11$564 NZD
Retailer 2$568 NZD
Retailer 8$603 NZD
Retailer 12$603 NZD
Retailer 3$887 NZD
Retailer 10$1,001 NZD
Retailer 5$1,122 NZD
Retailer 4$1,230 NZD
Retailer 6$1,854 NZD
Retailer 9$1,941 NZD
MOH London$2,431 NZD

20 data points across 12 retailers

10 retailers$486 NZD to $2,431 NZD

A
Cheapest Retailer
-
$486 NZD
$274 USD
B+
Retailer 2
-
$564 NZD
$318 USD
View
B+
Retailer 3
-
$568 NZD
$320 USD
View
Retailer 4
-
$603 NZD
$340 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$603 NZD
$340 USD
View
B
Retailer 6
-
$1,001 NZD
$564 USD
View
Retailer 7
-
$1,122 NZD
€602 EUR
View
Price last confirmed 8 days ago
B
Retailer 8
-
$1,854 NZD
$1,045 USD
View
B
Retailer 9
-
$1,941 NZD
$1,094 USD
View
Most Expensive
B
MOH London
LG440010794 · Oct 29
$2,431 NZD
£1,079 GBP
View
9 more retailers have this diamond
Prices start from $486 NZDSave up to $1,945 NZD

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
$486 NZD