Radiant|Lab Grown|IGI

1.40ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG836614457

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

Certificate IGI LG836614457

Diamond specifications and retailer prices

From £225 GBP
$299 USD
As of October 30, 2026
Save £2,899 GBP (93%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £3,124 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.4ct lab-grown radiant diamond

This 1.4ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG836614457 or 836614457. Listed at 22 retailers as of October 29, 2026, with prices from £225 to £3,124, a £2,899 spread on the same certified stone. Brilliant Earth lists it at £3,124. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.40
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.1°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836614457
Dimensions7.93 × 5.34 × 3.74 mm
L/W Ratio1.49
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.93 mm5.34 mm1.40 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836614457
Side View
Table 63.0%Crown 43.1°Girdle: Slightly ThickPavilion 35.9°Culet: NoneDepth 70.0%

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 30
Current: £3,124 GBP|Low: £225 GBP|High: £3,124 GBP|Avg: £861 GBP
Brilliant Earth
Retailer 2
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October 30, 2026
Retailer 8£225 GBP
Retailer 19£261 GBP
Retailer 11£268 GBP
Retailer 7£279 GBP
Retailer 18£279 GBP
Retailer 2£288 GBP
Retailer 3£394 GBP
Retailer 21£455 GBP
Retailer 20£470 GBP
Retailer 17£479 GBP
Retailer 13£494 GBP
Retailer 10£517 GBP
Retailer 4£760 GBP
Retailer 22£856 GBP
Retailer 6£896 GBP
Retailer 5£932 GBP
Retailer 14£1,026 GBP
Retailer 16£1,122 GBP
Retailer 15£1,164 GBP
Retailer 12£1,985 GBP
Retailer 9£2,343 GBP
Brilliant Earth£3,124 GBP

22 data points across 22 retailers

22 retailers£225 GBP to £3,124 GBP

A
Cheapest Retailer
-
£225 GBP
$299 USD
A
Retailer 2
-
£261 GBP
$347 USD
View
A
Retailer 3
-
£268 GBP
$357 USD
View
Final sale: no returns
A
Retailer 4
-
£279 GBP
$371 USD
View
A
Retailer 5
-
£279 GBP
$371 USD
View
A
Retailer 6
-
£288 GBP
View
A
Retailer 7
-
£394 GBP
$525 USD
View
A
Retailer 8
-
£455 GBP
$606 USD
View
A
Retailer 9
-
£470 GBP
$626 USD
View
A
Retailer 10
-
£479 GBP
ZAR 10,301 ZAR
View
A
Retailer 11
-
£494 GBP
View
A
Retailer 12
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£517 GBP
€656 EUR
View
B+
Retailer 13
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£760 GBP
$1,012 USD
View
B+
Retailer 14
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£856 GBP
$1,140 USD
View
B+
Retailer 15
-
£896 GBP
$1,193 USD
View
B+
Retailer 16
-
£932 GBP
$1,241 USD
View
B+
Retailer 17
-
£1,026 GBP
SGD 1,847 SGD
View
B+
Retailer 18
-
£1,122 GBP
View
B
Retailer 19
-
£1,164 GBP
$1,550 USD
View
B
Retailer 20
-
£1,985 GBP
$2,644 USD
View
Retailer 21
-
£2,343 GBP
$3,120 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
21738424A · Oct 29
£3,124 GBP
$4,160 USD
View
21 more retailers have this diamond
Prices start from £225 GBPSave up to £2,899 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
1.40ct Radiant
£225 GBP