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Radiant|Lab Grown|IGI

1.06ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG620472120

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

Certificate IGI LG620472120

Diamond specifications and retailer prices

From £455 GBP
$610 USD
As of October 31, 2026
Save £26 GBP (5%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £482 GBP at Diamond Quarter · As of November 2, 2026
View at Diamond Quarter

About this 1.06ct lab-grown radiant diamond

This 1.06ct lab-grown radiant sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG620472120 or 620472120. Listed at 2 retailers as of October 31, 2026, with a relatively tight 6% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.06
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.7°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620472120
Dimensions7.21 × 5.05 × 3.33 mm
L/W Ratio1.43
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
7.21 mm5.05 mm1.06 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620472120
Side View
Table 62.0%Crown 40.7°Girdle: MediumPavilion 36.2°Culet: NoneDepth 65.9%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: £488 GBP|Low: £199 GBP|High: £1,000 GBP|Avg: £410 GBP|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
May 26, 2026
Retailer 6£204 GBP
Retailer 5£238 GBP
Retailer 9£275 GBP
Retailer 2£336 GBP
Retailer 8£337 GBP
Retailer 7£346 GBP
Retailer 10£393 GBP
Retailer 3£455 GBP
Retailer 1£488 GBP
Retailer 4£1,000 GBP

50 data points across 10 retailers

2 retailers£455 GBP to £482 GBP

B+
Cheapest Retailer
-
£455 GBP
$610 USD
Most Expensive
B
Diamond Quarter
1.06SI1FLG20D40DN · Nov 2
£482 GBP
View
1 more retailer has this diamond
Prices start from £455 GBPSave up to £26 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+
1.06ct Radiant
£455 GBP