Round|Lab Grown|IGI

1.01ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG804642955

Shape and cutting style on the report: Round brilliant

Certificate IGI LG804642955

Diamond specifications and retailer prices

From £252 GBP
€322 EUR
As of October 27, 2026
Save £83 GBP (25%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £626 GBP at MOH London · As of October 21, 2026
View at MOH London

About this 1.01ct lab-grown round diamond

This 1.01ct 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 LG804642955 or 804642955. Listed at 16 retailers as of October 27, 2026, with a 33% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.01
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804642955
Dimensions6.44 × 6.37 × 3.98 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 mm6.37 mm1.01 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804642955
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.2%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: £626 GBP|Low: £103 GBP|High: £629 GBP|Avg: £271 GBP|+0.5%
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 27, 2026
Retailer 9£107 GBP
Retailer 4£124 GBP
Retailer 5£133 GBP
Retailer 11£133 GBP
Retailer 6£216 GBP
Retailer 12£247 GBP
Retailer 2£252 GBP
Retailer 7£296 GBP
Retailer 13£315 GBP
Retailer 10£335 GBP
Retailer 8£338 GBP
Retailer 3£428 GBP
MOH London£626 GBP

37 data points across 13 retailers

16 retailers£252 GBP to £335 GBP

Retailer 1
-
£107 GBP
$144 USD
Price last confirmed 10 days ago
Retailer 2
-
£124 GBP
$167 USD
View
Price last confirmed 13 days ago
Retailer 3
-
£133 GBP
$178 USD
View
Price last confirmed 17 days ago
Retailer 4
-
£133 GBP
$178 USD
View
Price last confirmed 12 days ago
Retailer 5
-
£216 GBP
View
Price last confirmed 10 days ago
Retailer 6
-
£225 GBP
$302 USD
View
Price last confirmed 9 days ago
Retailer 7
-
£247 GBP
$331 USD
View
Price last confirmed 10 days ago
B+
Retailer 8
-
£252 GBP
€322 EUR
View
Retailer 9
-
£299 GBP
$402 USD
View
Price last confirmed 91 days ago
Retailer 10
-
£315 GBP
$423 USD
View
Price last confirmed 9 days ago
B
Retailer 11
-
£335 GBP
$450 USD
View
Retailer 12
-
£338 GBP
$454 USD
View
Price last confirmed 10 days ago
Retailer 13
-
£408 GBP
$548 USD
View
Price last confirmed 47 days ago
Retailer 14
-
£428 GBP
$574 USD
View
Price last confirmed 12 days ago
Retailer 15
-
£469 GBP
$629 USD
View
Price last confirmed 10 days ago
Most Expensive
MOH London
LG804642955 · Oct 21
£626 GBP
View
Price last confirmed 12 days ago
15 more retailers have this diamond
Prices start from £252 GBPSave up to £83 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+
1.01ct Round
£252 GBP