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Radiant|Lab Grown|IGI

4.23ct H VS1 Radiant Lab Grown Diamond

ID • H/VS1 • IGI LG566301524

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

Certificate IGI LG566301524

Diamond specifications and retailer prices

From £1,576 GBP
$2,111 USD
As of November 1, 2026
Save £678 GBP (30%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £2,254 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 4.23ct lab-grown radiant diamond

This 4.23ct lab-grown radiant sits in the three to five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG566301524 or 566301524. Listed at 3 retailers as of October 31, 2026, with prices from £1,576 to £2,254, a £678 spread on the same certified stone. Brilliant Earth lists it at £2,254. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.23
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42°
Pavilion angle34°
OriginLab Grown
Grading LabIGI
CertificateIGI LG566301524
Dimensions11.72 × 7.84 × 5.26 mm
L/W Ratio1.49
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
11.72 mm7.84 mm4.23 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG566301524
Side View
Table 67.0%Crown 42°Girdle: Slightly ThickPavilion 34°Culet: NoneDepth 67.1%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 1
Current: £2,254 GBP|Low: £428 GBP|High: £6,380 GBP|Avg: £1,495 GBP
Brilliant Earth
Retailer 2
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October 13, 2026
Retailer 10£428 GBP
Retailer 8£555 GBP
Retailer 12£578 GBP
Retailer 15£636 GBP
Retailer 2£756 GBP
Retailer 11£924 GBP
Retailer 16£1,002 GBP
Retailer 14£1,056 GBP
Retailer 5£1,220 GBP
Retailer 13£1,388 GBP
Retailer 3£1,545 GBP
Retailer 4£1,561 GBP
Retailer 9£1,576 GBP
Retailer 6£2,009 GBP
Brilliant Earth£2,254 GBP
Retailer 7£6,380 GBP

10 data points across 16 retailers

3 retailers£1,576 GBP to £2,254 GBP

Retailer 1
-
£1,251 GBP
HK$13,100 HKD
Price last confirmed 58 days ago
B+
Retailer 2
-
£1,576 GBP
$2,111 USD
View
Most Expensive
B
Brilliant Earth
16084945A · Oct 31
£2,254 GBP
$3,020 USD
View
2 more retailers have this diamond
Prices start from £1,576 GBPSave up to £678 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+
4.23ct Radiant
£1,576 GBP