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Round|Lab Grown|IGI

1.05ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG620431074

Shape and cutting style on the report: Round brilliant

Certificate IGI LG620431074

Diamond specifications and retailer prices

From £167 GBP
As of November 5, 2026
Save £725 GBP (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £893 GBP at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 1.05ct lab-grown round diamond

This 1.05ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG620431074 or 620431074. Listed at 18 retailers as of November 4, 2026, with prices from £167 to £893, a £725 spread on the same certified stone. Reve Diamonds lists it at £893. 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

1.05
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620431074
Dimensions6.56 × 6.58 × 4.00 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.56 mm6.58 mm1.05 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620431074
Side View
Table 57.0%Crown 33.5°Girdle: MediumPavilion 41.1°Culet: NoneDepth 60.8%

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: Nov 5
Current: £338 GBP|Low: £144 GBP|High: £893 GBP|Avg: £388 GBP|+5.3%
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 12£150 GBP
Retailer 3£167 GBP
Retailer 4£186 GBP
Retailer 13£186 GBP
Retailer 11£230 GBP
Retailer 9£317 GBP
Retailer 2£323 GBP
Retailer 1£338 GBP
Retailer 6£360 GBP
Retailer 10£400 GBP
Retailer 5£419 GBP
Retailer 8£484 GBP
Retailer 7£869 GBP
Reve Diamonds£893 GBP

41 data points across 14 retailers

18 retailers£167 GBP to £893 GBP

Retailer 1
-
£150 GBP
Price last confirmed 17 days ago
A
Retailer 2
-
£167 GBP
View
Final sale: no returns
Retailer 3
-
£175 GBP
View
Price last confirmed 17 days ago
Retailer 4
-
£186 GBP
View
Price last confirmed 21 days ago
Retailer 5
-
£186 GBP
View
Price last confirmed 16 days ago
A
Retailer 6
-
£230 GBP
View
Retailer 7
-
£305 GBP
View
Price last confirmed 58 days ago
B+
Retailer 8
-
£317 GBP
View
B+
Retailer 9
-
£323 GBP
View
B+
Retailer 10
-
£338 GBP
View
B+
Retailer 11
-
£360 GBP
View
B+
Retailer 12
-
£400 GBP
View
B
Retailer 13
-
£419 GBP
View
B
Retailer 14
-
£484 GBP
View
Retailer 15
-
£600 GBP
View
Price last confirmed 16 days ago
B
Retailer 16
-
£639 GBP
View
B
Retailer 17
-
£869 GBP
View
Most Expensive
B
Reve Diamonds
C3DE76E96 · Nov 4
£893 GBP
$1,201 USD
View
17 more retailers have this diamond
Prices start from £167 GBPSave up to £725 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
1.05ct Round
£167 GBP