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0.51ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG502108737

Shape and cutting style on the report: Round brilliant

Certificate IGI LG502108737

Diamond specifications and retailer prices

From $486 NZD
$274 USD
As of November 1, 2026
Save $1,947 NZD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,434 NZD at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG502108737 or 502108737. Listed at 11 retailers as of October 29, 2026, with prices from $486 to $2,434, a $1,947 spread on the same certified stone. MOH London lists it at $2,434. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG502108737
Dimensions5.19 × 5.17 × 3.14 mm
L/W Ratio1.00
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
5.19 mm5.17 mm0.51 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG502108737
Side View
Table 55.5%Crown 31.9°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.5%

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 1
Current: $2,434 NZD|Low: $390 NZD|High: $2,449 NZD|Avg: $986 NZD|-0.6%
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
October 31, 2026
Retailer 8$486 NZD
Retailer 6$509 NZD
Retailer 13$545 NZD
Retailer 3$564 NZD
Retailer 9$568 NZD
Retailer 10$603 NZD
Retailer 12$603 NZD
Retailer 4$887 NZD
Retailer 11$1,001 NZD
Retailer 2$1,127 NZD
Retailer 5$1,230 NZD
Retailer 7$1,854 NZD
Retailer 14$1,941 NZD
MOH London$2,434 NZD

20 data points across 14 retailers

11 retailers$486 NZD to $2,434 NZD

A
Cheapest Retailer
-
$486 NZD
$274 USD
A
Retailer 2
-
$545 NZD
$307 USD
View
Final sale: no returns
A
Retailer 3
-
$564 NZD
$318 USD
View
A
Retailer 4
-
$568 NZD
$320 USD
View
Retailer 5
-
$603 NZD
$340 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
$603 NZD
$340 USD
View
B+
Retailer 7
-
$1,001 NZD
$564 USD
View
B+
Retailer 8
-
$1,127 NZD
€605 EUR
View
B
Retailer 9
-
$1,854 NZD
$1,045 USD
View
B
Retailer 10
-
$1,941 NZD
$1,094 USD
View
Most Expensive
B
MOH London
LG502108737 · Oct 29
$2,434 NZD
£1,080 GBP
View
10 more retailers have this diamond
Prices start from $486 NZDSave up to $1,947 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 Round
$486 NZD