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Radiant|Lab Grown|IGI

1.00ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG570331905

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG570331905

Diamond specifications and retailer prices

From £83 GBP
$111 USD
As of October 30, 2026
Save £777 GBP (90%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £860 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1ct lab-grown radiant diamond

This 1ct lab-grown radiant 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 LG570331905 or 570331905. Listed at 19 retailers as of October 26, 2026, with prices from £83 to £860, a £777 spread on the same certified stone. MOH London lists it at £860. 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

1.00
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle27.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG570331905
Dimensions8.10 × 4.63 × 3.06 mm
L/W Ratio1.75
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.10 mm4.63 mm1.00 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG570331905
Side View
Table 61.5%Crown 35.5°Girdle: MediumPavilion 27.4°Culet: NoneDepth 66.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £860 GBP|Low: £66 GBP|High: £869 GBP|Avg: £250 GBP|+0.1%
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
Retailer 14
October 30, 2026
Retailer 10£83 GBP
Retailer 5£93 GBP
Retailer 3£96 GBP
Retailer 4£110 GBP
Retailer 12£110 GBP
Retailer 8£190 GBP
Retailer 7£195 GBP
Retailer 13£204 GBP
Retailer 2£206 GBP
Retailer 6£289 GBP
Retailer 14£331 GBP
Retailer 9£369 GBP
Retailer 11£403 GBP
MOH London£860 GBP

43 data points across 14 retailers

19 retailers£83 GBP to £860 GBP

A
Cheapest Retailer
-
£83 GBP
$111 USD
A
Retailer 2
-
£93 GBP
$125 USD
View
Final sale: no returns
A
Retailer 3
-
£96 GBP
$129 USD
View
A
Retailer 4
-
£110 GBP
$147 USD
View
A
Retailer 5
-
£110 GBP
$147 USD
View
A
Retailer 6
-
£124 GBP
HK$1,300 HKD
View
Retailer 7
-
£190 GBP
€243 EUR
View
Price last confirmed 7 days ago
A
Retailer 8
-
£195 GBP
View
A
Retailer 9
-
£203 GBP
$272 USD
View
B+
Retailer 10
-
£204 GBP
$273 USD
View
A
Retailer 11
-
£206 GBP
View
B+
Retailer 12
-
£289 GBP
$387 USD
View
B+
Retailer 13
-
£289 GBP
SGD 524 SGD
View
B+
Retailer 14
-
£331 GBP
$443 USD
View
B+
Retailer 15
-
£349 GBP
View
B+
Retailer 16
-
£369 GBP
$494 USD
View
B
Retailer 17
-
£384 GBP
View
B
Retailer 18
-
£403 GBP
$540 USD
View
Most Expensive
B
MOH London
LG570331905 · Oct 26
£860 GBP
View
18 more retailers have this diamond
Prices start from £83 GBPSave up to £777 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 Radiant
£83 GBP