Round|Lab Grown|IGI

1.00ct G VS1 Round Lab Grown Diamond

EX • G/VS1 • IGI LG818687089

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818687089

Diamond specifications and retailer prices

From £260 GBP
€332 EUR
As of October 27, 2026
Save £195 GBP (43%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £647 GBP at MOH London · As of October 21, 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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG818687089 or 818687089. Listed at 20 retailers as of October 27, 2026, with a 75% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818687089
Dimensions6.38 × 6.41 × 3.96 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
6.38 mm6.41 mm1.00 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818687089
Side View
Table 58.0%Crown 33.7°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: £647 GBP|Low: £107 GBP|High: £651 GBP|Avg: £303 GBP|-0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
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Retailer 6
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Retailer 9
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Retailer 11
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Retailer 13
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Retailer 19
October 26, 2026
Retailer 18£111 GBP
Retailer 19£129 GBP
Retailer 4£138 GBP
Retailer 6£138 GBP
Retailer 10£210 GBP
Retailer 13£226 GBP
Retailer 16£233 GBP
Retailer 14£238 GBP
Retailer 3£253 GBP
Retailer 12£260 GBP
Retailer 5£299 GBP
Retailer 8£319 GBP
Retailer 15£337 GBP
Retailer 7£443 GBP
Retailer 2£455 GBP
Retailer 17£468 GBP
Retailer 9£478 GBP
Retailer 11£484 GBP
MOH London£647 GBP

22 data points across 19 retailers

20 retailers£260 GBP to £455 GBP

Retailer 1
-
£111 GBP
$149 USD
Price last confirmed 9 days ago
Retailer 2
-
£129 GBP
$173 USD
View
Price last confirmed 8 days ago
Retailer 3
-
£138 GBP
$185 USD
View
Price last confirmed 15 days ago
Retailer 4
-
£138 GBP
$185 USD
View
Price last confirmed 8 days ago
Retailer 5
-
£210 GBP
$282 USD
View
Price last confirmed 7 days ago
Retailer 6
-
£226 GBP
View
Price last confirmed 7 days ago
Retailer 7
-
£233 GBP
ZAR 5,039 ZAR
View
Price last confirmed 9 days ago
Retailer 8
-
£238 GBP
View
Price last confirmed 8 days ago
Retailer 9
-
£253 GBP
$339 USD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
£260 GBP
€332 EUR
View
Retailer 11
-
£291 GBP
$390 USD
View
Price last confirmed 10 days ago
Retailer 12
-
£299 GBP
$400 USD
View
Price last confirmed 27 days ago
Retailer 13
-
£319 GBP
$428 USD
View
Price last confirmed 7 days ago
Retailer 14
-
£337 GBP
A$695 AUD
View
Price last confirmed 8 days ago
Retailer 15
-
£443 GBP
$593 USD
View
Price last confirmed 7 days ago
B
Retailer 16
-
£455 GBP
$610 USD
View
Retailer 17
-
£468 GBP
$627 USD
View
Price last confirmed 8 days ago
Retailer 18
-
£478 GBP
$640 USD
View
Price last confirmed 7 days ago
Retailer 19
-
£484 GBP
$649 USD
View
Price last confirmed 8 days ago
Most Expensive
MOH London
LG818687089 · Oct 21
£647 GBP
View
Price last confirmed 11 days ago
19 more retailers have this diamond
Prices start from £260 GBPSave up to £195 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.

B+
1.00ct Round
£260 GBP