CaratHunter
Plans
Round|Lab Grown|IGI

1.26ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG683543026

Shape and cutting style on the report: Round brilliant

Certificate IGI LG683543026

Diamond specifications and retailer prices

From £149 GBP
As of November 5, 2026
Save £740 GBP (83%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £889 GBP at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG683543026 or 683543026. Listed at 22 retailers as of November 4, 2026, with prices from £149 to £889, a £740 spread on the same certified stone. Reve Diamonds lists it at £889. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG683543026
Dimensions6.95 × 6.89 × 4.27 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.95 mm6.89 mm1.26 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG683543026
Side View
Table 58.0%Crown 35.8°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.8%

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: £335 GBP|Low: £148 GBP|High: £889 GBP|Avg: £394 GBP|+4.4%
Retailer 1
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
Retailer 15
Retailer 16
Retailer 17
Reve Diamonds
November 6, 2026
Retailer 7£149 GBP
Retailer 15£166 GBP
Retailer 16£173 GBP
Retailer 3£185 GBP
Retailer 4£185 GBP
Retailer 17£305 GBP
Retailer 5£322 GBP
Retailer 1£335 GBP
Retailer 9£338 GBP
Retailer 13£352 GBP
Retailer 10£358 GBP
Retailer 2£369 GBP
Retailer 14£390 GBP
Retailer 8£595 GBP
Retailer 12£597 GBP
Retailer 6£635 GBP
Retailer 11£863 GBP
Reve Diamonds£889 GBP

33 data points across 18 retailers

22 retailers£149 GBP to £889 GBP

A
Cheapest Retailer
-
£149 GBP
A
Retailer 2
-
£166 GBP
View
Final sale: no returns
A
Retailer 3
-
£173 GBP
View
A
Retailer 4
-
£185 GBP
View
Retailer 5
-
£185 GBP
View
Price last confirmed 12 days ago
A
Retailer 6
-
£305 GBP
View
B+
Retailer 7
-
£322 GBP
View
B+
Retailer 8
-
£335 GBP
View
B+
Retailer 9
-
£338 GBP
View
B+
Retailer 10
-
£352 GBP
View
B+
Retailer 11
-
£358 GBP
View
B+
Retailer 12
-
£369 GBP
View
B+
Retailer 13
-
£390 GBP
View
B+
Retailer 14
-
£461 GBP
View
B+
Retailer 15
-
£461 GBP
View
B+
Retailer 16
-
£507 GBP
View
Retailer 17
-
£590 GBP
View
Price last confirmed 46 days ago
B
Retailer 18
-
£595 GBP
View
B
Retailer 19
-
£597 GBP
View
B
Retailer 20
-
£635 GBP
View
B
Retailer 21
-
£863 GBP
View
Most Expensive
B
Reve Diamonds
AAF9B4E32 · Nov 4
£889 GBP
$1,197 USD
View
21 more retailers have this diamond
Prices start from £149 GBPSave up to £740 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 Round
£149 GBP