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Round|Lab Grown|IGI

1.51ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG830613026

Shape and cutting style on the report: Round brilliant

Certificate IGI LG830613026

Diamond specifications and retailer prices

From £155 GBP
As of November 4, 2026
Save £696 GBP (82%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £851 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG830613026 or 830613026. Listed at 13 retailers as of November 4, 2026, with prices from £155 to £851, a £696 spread on the same certified stone. Reve Diamonds lists it at £851. 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

1.51
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830613026
Dimensions7.30 × 7.33 × 4.56 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.30 mm7.33 mm1.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830613026
Side View
Table 58.0%Crown 35.6°Girdle: MediumPavilion 41.1°Culet: NoneDepth 62.4%

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 4
Current: £556 GBP|Low: £155 GBP|High: £900 GBP|Avg: £464 GBP|-9.9%
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
Reve Diamonds
November 6, 2026
Retailer 3£155 GBP
Retailer 12£190 GBP
Retailer 6£230 GBP
Retailer 11£294 GBP
Retailer 7£308 GBP
Retailer 13£311 GBP
Retailer 5£328 GBP
Retailer 10£412 GBP
Retailer 9£528 GBP
Retailer 1£556 GBP
Retailer 4£594 GBP
Retailer 2£646 GBP
Retailer 8£802 GBP
Reve Diamonds£851 GBP

22 data points across 14 retailers

13 retailers£155 GBP to £851 GBP

A
Cheapest Retailer
-
£155 GBP
Final sale: no returns
A
Retailer 2
-
£190 GBP
View
B+
Retailer 3
-
£230 GBP
View
A
Retailer 4
-
£294 GBP
View
A
Retailer 5
-
£308 GBP
View
A
Retailer 6
-
£311 GBP
View
B+
Retailer 7
-
£412 GBP
View
B+
Retailer 8
-
£528 GBP
View
B+
Retailer 9
-
£556 GBP
View
B+
Retailer 10
-
£594 GBP
View
B
Retailer 11
-
£646 GBP
View
B
Retailer 12
-
£802 GBP
View
Most Expensive
B
Reve Diamonds
73E8D75D1 · Nov 6
£851 GBP
$1,146 USD
View
12 more retailers have this diamond
Prices start from £155 GBPSave up to £696 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
1.51ct Round
£155 GBP