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Radiant|Lab Grown|IGI

4.55ct D SI1 Radiant Lab Grown Diamond

VG • D/SI1 • IGI LG846656934

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

Certificate IGI LG846656934

Diamond specifications and retailer prices

From £509 GBP
As of October 26, 2026
Save £4,805 GBP (90%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £5,314 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 4.55ct lab-grown radiant diamond

This 4.55ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG846656934 or 846656934. Listed at 9 retailers as of October 26, 2026, with prices from £509 to £5,314, a £4,805 spread on the same certified stone. Brilliant Earth lists it at £5,314. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

4.55
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.6°
Pavilion angle32.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846656934
Dimensions11.37 × 8.38 × 5.42 mm
L/W Ratio1.36
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.37 mm8.38 mm4.55 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846656934
Side View
Table 64.0%Crown 43.6°Girdle: MED-STKPavilion 32.9°Culet: NoneDepth 64.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 26
Current: £5,314 GBP|Low: £493 GBP|High: £5,314 GBP|Avg: £1,532 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 9£493 GBP
Retailer 5£509 GBP
Retailer 8£592 GBP
Retailer 7£646 GBP
Retailer 2£795 GBP
Retailer 6£845 GBP
Retailer 3£1,231 GBP
Retailer 10£1,728 GBP
Retailer 4£2,378 GBP
Brilliant Earth£5,314 GBP

4 data points across 10 retailers

9 retailers£509 GBP to £5,314 GBP

A
Cheapest Retailer
-
£509 GBP
A
Retailer 2
-
£592 GBP
HK$6,200 HKD
View
A
Retailer 3
-
£646 GBP
$865 USD
View
A
Retailer 4
-
£795 GBP
€1,014 EUR
View
A
Retailer 5
-
£845 GBP
View
B+
Retailer 6
-
£1,231 GBP
$1,649 USD
View
B
Retailer 7
-
£1,728 GBP
SGD 3,128 SGD
View
B
Retailer 8
-
£2,378 GBP
View
Most Expensive
B
Brilliant Earth
22251606A · Oct 29
£5,314 GBP
$7,120 USD
View
8 more retailers have this diamond
Prices start from £509 GBPSave up to £4,805 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
4.55ct Radiant
£509 GBP