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Round|Lab Grown|IGI

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 €536 EUR
$599 USD
As of October 29, 2026
Save €2,364 EUR (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €2,900 EUR at MOH London · As of October 29, 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 October 29, 2026, with prices from €536 to €2,900, a €2,364 spread on the same certified stone. MOH London lists it at €2,900. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: €2,900 EUR|Low: €515 EUR|High: €2,919 EUR|Avg: €1,128 EUR|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 6€536 EUR
Retailer 9€599 EUR
Retailer 2€644 EUR
Retailer 7€664 EUR
Retailer 10€664 EUR
Retailer 4€779 EUR
Retailer 8€1,020 EUR
Retailer 11€1,055 EUR
Retailer 5€1,649 EUR
Retailer 3€1,779 EUR
MOH London€2,900 EUR

20 data points across 11 retailers

11 retailers€536 EUR to €2,900 EUR

A
Cheapest Retailer
-
€536 EUR
$599 USD
A
Retailer 2
-
€599 EUR
$669 USD
View
Final sale: no returns
A
Retailer 3
-
€600 EUR
$670 USD
View
B+
Retailer 4
-
€644 EUR
$720 USD
View
Retailer 5
-
€664 EUR
$742 USD
View
Price last confirmed 15 days ago
B+
Retailer 6
-
€664 EUR
$742 USD
View
B+
Retailer 7
-
€779 EUR
$870 USD
View
B
Retailer 8
-
€1,020 EUR
$1,139 USD
View
B
Retailer 9
-
€1,649 EUR
$1,842 USD
View
B
Retailer 10
-
€1,747 EUR
$1,952 USD
View
Most Expensive
B
MOH London
LG451057956 · Oct 29
€2,900 EUR
£2,551 GBP
View
10 more retailers have this diamond
Prices start from €536 EURSave up to €2,364 EUR

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
€536 EUR