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Round|Lab Grown|IGI

1.03ct G VS1 Round Lab Grown Diamond

ID • G/VS1 • IGI LG818639581

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818639581

Diamond specifications and retailer prices

From £131 GBP
$175 USD
As of October 30, 2026
Save £553 GBP (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £683 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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG818639581 or 818639581. Listed at 13 retailers as of October 29, 2026, with prices from £131 to £683, a £553 spread on the same certified stone. MOH London lists it at £683. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.03
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818639581
Dimensions6.48 × 6.46 × 3.99 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
6.48 mm6.46 mm1.03 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818639581
Side View
Table 59.0%Crown 35°Girdle: MediumPavilion 41°Culet: NoneDepth 61.6%

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: Oct 30
Current: £683 GBP|Low: £131 GBP|High: £688 GBP|Avg: £370 GBP|+3.4%
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
October 30, 2026
Retailer 11£131 GBP
Retailer 4£222 GBP
Retailer 9£250 GBP
Retailer 6£252 GBP
Retailer 7£254 GBP
Retailer 8£265 GBP
Retailer 3£302 GBP
Retailer 10£354 GBP
Retailer 2£380 GBP
Retailer 13£398 GBP
Retailer 5£467 GBP
Retailer 12£508 GBP
MOH London£683 GBP

41 data points across 13 retailers

13 retailers£131 GBP to £683 GBP

A
Cheapest Retailer
-
£131 GBP
$175 USD
Final sale: no returns
A
Retailer 2
-
£222 GBP
$298 USD
View
B+
Retailer 3
-
£250 GBP
ZAR 5,403 ZAR
View
A
Retailer 4
-
£252 GBP
View
B+
Retailer 5
-
£254 GBP
View
B+
Retailer 6
-
£265 GBP
$355 USD
View
B+
Retailer 7
-
£302 GBP
$405 USD
View
B+
Retailer 8
-
£354 GBP
A$730 AUD
View
B+
Retailer 9
-
£380 GBP
$509 USD
View
B+
Retailer 10
-
£398 GBP
SGD 720 SGD
View
B
Retailer 11
-
£475 GBP
$637 USD
View
B
Retailer 12
-
£508 GBP
$681 USD
View
Most Expensive
B
MOH London
LG818639581 · Oct 29
£683 GBP
View
12 more retailers have this diamond
Prices start from £131 GBPSave up to £553 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
£131 GBP