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Radiant|Lab Grown|IGI

1.35ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG816615915

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

Certificate IGI LG816615915

Diamond specifications and retailer prices

From £257 GBP
$344 USD
As of October 30, 2026
Save £1,721 GBP (87%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £2,265 GBP at Rare Carat · As of October 21, 2026
View at Rare Carat

About this 1.35ct lab-grown radiant diamond

This 1.35ct 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 LG816615915 or 816615915. Listed at 19 retailers as of October 30, 2026, with a 670% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.35
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.7°
Pavilion angle37.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816615915
Dimensions7.63 × 5.32 × 3.86 mm
L/W Ratio1.43
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
7.63 mm5.32 mm1.35 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816615915
Side View
Table 66.0%Crown 45.7°Girdle: Slightly ThickPavilion 37.2°Culet: NoneDepth 72.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £2,265 GBP|Low: £241 GBP|High: £3,090 GBP|Avg: £996 GBP|-1.5%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
October 30, 2026
Retailer 12£257 GBP
Retailer 7£369 GBP
Retailer 3£384 GBP
Retailer 14£441 GBP
Retailer 11£460 GBP
Retailer 9£474 GBP
Retailer 4£498 GBP
Retailer 16£706 GBP
Retailer 13£823 GBP
Retailer 5£836 GBP
Retailer 15£898 GBP
Retailer 6£990 GBP
Retailer 10£1,080 GBP
Retailer 8£1,081 GBP
Retailer 2£1,978 GBP
Rare Carat£2,265 GBP

31 data points across 16 retailers

19 retailers£257 GBP to £1,978 GBP

A
Cheapest Retailer
-
£257 GBP
$344 USD
Final sale: no returns
Retailer 2
-
£286 GBP
$383 USD
View
Price last confirmed 28 days ago
Retailer 3
-
£334 GBP
$447 USD
View
Price last confirmed 33 days ago
Retailer 4
-
£369 GBP
$495 USD
View
Price last confirmed 27 days ago
A
Retailer 5
-
£384 GBP
$515 USD
View
A
Retailer 6
-
£441 GBP
$591 USD
View
A
Retailer 7
-
£460 GBP
ZAR 9,967 ZAR
View
A
Retailer 8
-
£474 GBP
View
A
Retailer 9
-
£498 GBP
€635 EUR
View
B+
Retailer 10
-
£706 GBP
$946 USD
View
B+
Retailer 11
-
£823 GBP
$1,103 USD
View
B+
Retailer 12
-
£836 GBP
$1,120 USD
View
B+
Retailer 13
-
£898 GBP
$1,203 USD
View
B+
Retailer 14
-
£990 GBP
SGD 1,792 SGD
View
B+
Retailer 15
-
£1,080 GBP
View
Retailer 16
-
£1,081 GBP
View
Price last confirmed 25 days ago
Retailer 17
-
£1,188 GBP
$1,592 USD
View
Price last confirmed 30 days ago
B
Retailer 18
-
£1,978 GBP
$2,650 USD
View
Most Expensive
Rare Carat
PD-230705 · Oct 21
£2,265 GBP
$3,035 USD
View
Price last confirmed 9 days ago
18 more retailers have this diamond
Prices start from £257 GBPSave up to £1,721 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
1.35ct Radiant
£257 GBP