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Round|Lab Grown|IGI

1.03ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG839672512

Shape and cutting style on the report: Round brilliant

Certificate IGI LG839672512

Diamond specifications and retailer prices

From £104 GBP
$139 USD
As of October 29, 2026
Save £499 GBP (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £603 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.03ct lab-grown round diamond

This 1.03ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG839672512 or 839672512. Listed at 14 retailers as of October 29, 2026, with prices from £104 to £603, a £499 spread on the same certified stone. MOH London lists it at £603. 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

1.03
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839672512
Dimensions6.44 × 6.48 × 4.00 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.44 mm6.48 mm1.03 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839672512
Side View
Table 57.0%Crown 35.5°Girdle: MediumPavilion 40.7°Culet: NoneDepth 61.9%

Caratlytics Score

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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: £603 GBP|Low: £104 GBP|High: £607 GBP|Avg: £275 GBP|-0.6%
MOH London
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
November 1, 2026
Retailer 12£104 GBP
Retailer 4£120 GBP
Retailer 11£128 GBP
Retailer 14£128 GBP
Retailer 8£218 GBP
Retailer 9£229 GBP
Retailer 2£237 GBP
Retailer 6£240 GBP
Retailer 7£286 GBP
Retailer 10£325 GBP
Retailer 13£354 GBP
Retailer 5£368 GBP
Retailer 3£412 GBP
MOH London£603 GBP

26 data points across 14 retailers

14 retailers£104 GBP to £603 GBP

A
Cheapest Retailer
-
£104 GBP
$139 USD
A
Retailer 2
-
£120 GBP
$161 USD
View
A
Retailer 3
-
£128 GBP
$172 USD
View
Retailer 4
-
£128 GBP
$172 USD
View
Price last confirmed 17 days ago
A
Retailer 5
-
£218 GBP
View
A
Retailer 6
-
£229 GBP
€292 EUR
View
A
Retailer 7
-
£237 GBP
$318 USD
View
B+
Retailer 8
-
£240 GBP
$322 USD
View
B+
Retailer 9
-
£286 GBP
View
B+
Retailer 10
-
£325 GBP
$435 USD
View
B
Retailer 11
-
£354 GBP
SGD 641 SGD
View
B+
Retailer 12
-
£368 GBP
$493 USD
View
B
Retailer 13
-
£412 GBP
$552 USD
View
Most Expensive
B
MOH London
LG839672512 · Oct 29
£603 GBP
View
13 more retailers have this diamond
Prices start from £104 GBPSave up to £499 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
1.03ct Round
£104 GBP