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1.26ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG451057956

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057956

Diamond specifications and retailer prices

From $1,066 NZD
As of November 5, 2026
Save $4,668 NZD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,734 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.26ct lab-grown round diamond

This 1.26ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451057956 or 451057956. Listed at 11 retailers as of November 1, 2026, with prices from $1,066 to $5,734, a $4,668 spread on the same certified stone. MOH London lists it at $5,734. 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

1.26
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057956
Dimensions7.16 × 7.05 × 4.17 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) process Type IIa
Top View
7.16 mm7.05 mm1.26 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057956
Side View
Table 57.0%Crown 31.5°Girdle: MediumPavilion 40.3°Culet: NoneDepth 59.1%

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 5
Current: $5,734 NZD|Low: $1,023 NZD|High: $5,802 NZD|Avg: $2,262 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 6$1,066 NZD
Retailer 9$1,190 NZD
Retailer 2$1,281 NZD
Retailer 7$1,320 NZD
Retailer 10$1,320 NZD
Retailer 4$1,548 NZD
Retailer 8$2,026 NZD
Retailer 11$2,097 NZD
Retailer 5$3,277 NZD
Retailer 3$3,535 NZD
MOH London$5,734 NZD

19 data points across 11 retailers

11 retailers$1,066 NZD to $5,734 NZD

A
Cheapest Retailer
-
$1,066 NZD
B+
Retailer 2
-
$1,190 NZD
View
Final sale: no returns
B+
Retailer 3
-
$1,192 NZD
View
B+
Retailer 4
-
$1,281 NZD
View
Retailer 5
-
$1,320 NZD
View
Price last confirmed 21 days ago
B+
Retailer 6
-
$1,320 NZD
View
B+
Retailer 7
-
$1,548 NZD
View
B
Retailer 8
-
$2,026 NZD
View
B
Retailer 9
-
$3,277 NZD
View
B
Retailer 10
-
$3,472 NZD
View
Most Expensive
B
MOH London
LG451057956 · Nov 1
$5,734 NZD
£2,538 GBP
View
10 more retailers have this diamond
Prices start from $1,066 NZDSave up to $4,668 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
1.26ct Round
$1,066 NZD