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Round|Lab Grown|IGI

1.03ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG766683154

Shape and cutting style on the report: Round brilliant

Certificate IGI LG766683154

Diamond specifications and retailer prices

From £108 GBP
$145 USD
As of November 1, 2026
Save £517 GBP (83%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £626 GBP at MOH London · As of November 1, 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 LG766683154 or 766683154. Listed at 10 retailers as of November 1, 2026, with prices from £108 to £626, a £517 spread on the same certified stone. MOH London lists it at £626. 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
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG766683154
Dimensions6.43 × 6.49 × 4.03 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
6.43 mm6.49 mm1.03 ctG / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LG766683154
Side View
Table 57.0%Crown 33.6°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.4%

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: Nov 1
Current: £626 GBP|Low: £108 GBP|High: £647 GBP|Avg: £280 GBP|-2.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 5£108 GBP
Retailer 9£125 GBP
Retailer 7£134 GBP
Retailer 10£134 GBP
Retailer 2£230 GBP
Retailer 8£232 GBP
Retailer 4£249 GBP
Retailer 6£431 GBP
Retailer 3£455 GBP
MOH London£626 GBP

43 data points across 10 retailers

10 retailers£108 GBP to £626 GBP

A
Cheapest Retailer
-
£108 GBP
$145 USD
A
Retailer 2
-
£125 GBP
$168 USD
View
Retailer 3
-
£134 GBP
$179 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
£134 GBP
$179 USD
View
A
Retailer 5
-
£230 GBP
View
B+
Retailer 6
-
£232 GBP
$311 USD
View
B+
Retailer 7
-
£249 GBP
$333 USD
View
B
Retailer 8
-
£431 GBP
$577 USD
View
B
Retailer 9
-
£455 GBP
$609 USD
View
Most Expensive
B
MOH London
LG766683154 · Nov 1
£626 GBP
View
9 more retailers have this diamond
Prices start from £108 GBPSave up to £517 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
£108 GBP