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Princess|Lab Grown|IGI

1.26ct E SI1 Princess Lab Grown Diamond

EX • E/SI1 • IGI LG841603560

Shape and cutting style on the report: Princess cut

Certificate IGI LG841603560

Diamond specifications and retailer prices

From £129 GBP
$173 USD
As of October 30, 2026
Save £453 GBP (78%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £582 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.26ct lab-grown princess diamond

This 1.26ct lab-grown princess sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG841603560 or 841603560. Listed at 3 retailers as of October 30, 2026, with prices from £129 to £582, a £453 spread on the same certified stone. Brilliant Earth lists it at £582. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.5°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG841603560
Dimensions5.96 × 5.82 × 4.24 mm
L/W Ratio1.02
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.96 mm5.82 mm1.26 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG841603560
Side View
Table 66.0%Crown 42.5°Girdle: MediumPavilion 39.4°Culet: NoneDepth 72.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £582 GBP|Low: £129 GBP|High: £828 GBP|Avg: £477 GBP|-29.7%
Brilliant Earth
Retailer 2
Retailer 3
October 30, 2026
Retailer 3£129 GBP
Retailer 2£260 GBP
Brilliant Earth£582 GBP

25 data points across 3 retailers

3 retailers£129 GBP to £582 GBP

A
Cheapest Retailer
-
£129 GBP
$173 USD
Final sale: no returns
A
Retailer 2
-
£260 GBP
View
Most Expensive
B
Brilliant Earth
21703354A · Oct 30
£582 GBP
$780 USD
View
2 more retailers have this diamond
Prices start from £129 GBPSave up to £453 GBP

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 Princess
£129 GBP