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Round|Lab Grown|IGI

1.00ct G VVS1 Round Lab Grown Diamond

ID • G/VVS1 • IGI LG840645920

Shape and cutting style on the report: Round brilliant

Certificate IGI LG840645920

Diamond specifications and retailer prices

From £129 GBP
$173 USD
As of October 30, 2026
Save £518 GBP (80%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £647 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG840645920 or 840645920. Listed at 13 retailers as of October 29, 2026, with prices from £129 to £647, a £518 spread on the same certified stone. MOH London lists it at £647. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
G
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840645920
Dimensions6.46 × 6.49 × 3.91 mm
L/W Ratio1.00
Girdle conditionFaceted
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 Faint Blue
Top View
6.46 mm6.49 mm1.00 ctG / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840645920
Side View
Table 59.0%Crown 33.7°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.4%

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: £647 GBP|Low: £126 GBP|High: £647 GBP|Avg: £304 GBP|+1.3%
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 31, 2026
Retailer 12£129 GBP
Retailer 10£138 GBP
Retailer 6£231 GBP
Retailer 11£235 GBP
Retailer 8£236 GBP
Retailer 7£238 GBP
Retailer 2£239 GBP
Retailer 4£253 GBP
Retailer 9£336 GBP
Retailer 5£377 GBP
Retailer 3£468 GBP
Retailer 13£484 GBP
MOH London£647 GBP

28 data points across 13 retailers

13 retailers£129 GBP to £647 GBP

A
Cheapest Retailer
-
£129 GBP
$173 USD
A
Retailer 2
-
£138 GBP
$185 USD
View
A
Retailer 3
-
£231 GBP
View
A
Retailer 4
-
£235 GBP
$315 USD
View
A
Retailer 5
-
£236 GBP
ZAR 5,118 ZAR
View
B+
Retailer 6
-
£238 GBP
View
A
Retailer 7
-
£239 GBP
€305 EUR
View
B+
Retailer 8
-
£253 GBP
$339 USD
View
B+
Retailer 9
-
£336 GBP
A$692 AUD
View
Retailer 10
-
£377 GBP
$505 USD
View
Price last confirmed 23 days ago
B
Retailer 11
-
£468 GBP
$627 USD
View
B
Retailer 12
-
£484 GBP
$649 USD
View
Most Expensive
B
MOH London
LG840645920 · Oct 29
£647 GBP
View
12 more retailers have this diamond
Prices start from £129 GBPSave up to £518 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
1.00ct Round
£129 GBP