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Radiant|Lab Grown|IGI

1.23ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG537213160

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

Certificate IGI LG537213160

Diamond specifications and retailer prices

From £516 GBP
$690 USD
As of November 6, 2026
1 retailer carries this diamond
Only listing: £516 GBP at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

About this 1.23ct lab-grown radiant diamond

This 1.23ct 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 LG537213160 or 537213160. Listed at a single retailer as of November 6, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

1.23
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.4°
Pavilion angle32.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG537213160
Dimensions7.38 × 5.39 × 3.55 mm
L/W Ratio1.37
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
7.38 mm5.39 mm1.23 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG537213160
Side View
Table 65.5%Crown 44.4°Girdle: Slightly ThickPavilion 32.6°Culet: NoneDepth 65.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: £516 GBP|Low: £137 GBP|High: £999 GBP|Avg: £600 GBP|-4.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
July 28, 2026
Retailer 3£137 GBP
Retailer 4£315 GBP
Retailer 2£332 GBP
Retailer 5£407 GBP
Retailer 8£457 GBP
Brilliant Earth£516 GBP
Retailer 6£631 GBP
Retailer 10£731 GBP
Retailer 7£968 GBP
Retailer 9£991 GBP

73 data points across 10 retailers

1 retailer

B
Brilliant Earth
17973843A · Nov 6
£516 GBP
$690 USD
View

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
1.23ct Radiant
£516 GBP