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Radiant|Lab Grown|IGI

0.40ct D IF Radiant Lab Grown Diamond

D/IF • IGI LG656494792

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

Certificate IGI LG656494792

Diamond specifications and retailer prices

From £101 GBP
$135 USD
As of October 30, 2026
Save £544 GBP (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £645 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 0.4ct lab-grown radiant diamond

This 0.4ct lab-grown radiant sits in the sub-half-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless) and certified by IGI LG656494792 or 656494792. Listed at 18 retailers as of October 26, 2026, with prices from £101 to £645, a £544 spread on the same certified stone. MOH London lists it at £645. 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

0.40
Carat
D
Colour
IF
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle53.6°
Pavilion angle37.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG656494792
Dimensions3.61 × 3.61 × 5.35 mm
L/W Ratio1.00
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
3.61 mm3.61 mm0.40 ctD / IF
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG656494792
Side View
Table 67.0%Crown 53.6°Girdle: MED-THKPavilion 37.1°Culet: NoneDepth 68.1%

Caratlytics Score

How it works →
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 30
Current: £645 GBP|Low: £96 GBP|High: £651 GBP|Avg: £240 GBP|-1.0%
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
October 30, 2026
Retailer 11£101 GBP
Retailer 13£113 GBP
Retailer 3£116 GBP
Retailer 10£125 GBP
Retailer 12£125 GBP
Retailer 5£170 GBP
Retailer 4£223 GBP
Retailer 6£238 GBP
Retailer 7£249 GBP
Retailer 2£284 GBP
Retailer 8£331 GBP
Retailer 9£358 GBP
MOH London£645 GBP

45 data points across 13 retailers

18 retailers£101 GBP to £645 GBP

Retailer 1
-
£101 GBP
$135 USD
Price last confirmed 23 days ago
A
Retailer 2
-
£101 GBP
$135 USD
View
A
Retailer 3
-
£113 GBP
$151 USD
View
Final sale: no returns
Retailer 4
-
£116 GBP
$156 USD
View
Price last confirmed 35 days ago
Retailer 5
-
£125 GBP
$167 USD
View
Price last confirmed 28 days ago
A
Retailer 6
-
£125 GBP
$167 USD
View
A
Retailer 7
-
£160 GBP
$215 USD
View
A
Retailer 8
-
£170 GBP
$228 USD
View
B+
Retailer 9
-
£223 GBP
$299 USD
View
B+
Retailer 10
-
£238 GBP
View
B+
Retailer 11
-
£249 GBP
ZAR 5,387 ZAR
View
B+
Retailer 12
-
£284 GBP
$380 USD
View
B+
Retailer 13
-
£331 GBP
A$682 AUD
View
B
Retailer 14
-
£358 GBP
A$738 AUD
View
Retailer 15
-
£443 GBP
$593 USD
View
Price last confirmed 30 days ago
B
Retailer 16
-
£443 GBP
$593 USD
View
B
Retailer 17
-
£573 GBP
$768 USD
View
Most Expensive
B
MOH London
LG656494792 · Oct 26
£645 GBP
View
17 more retailers have this diamond
Prices start from £101 GBPSave up to £544 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
0.40ct Radiant
£101 GBP