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Radiant|Lab Grown|IGI

1.29ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG768628909

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

Certificate IGI LG768628909

Diamond specifications and retailer prices

From £401 GBP
HK$4,200 HKD
As of November 1, 2026
Save £2,096 GBP (84%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,496 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.29ct lab-grown radiant diamond

This 1.29ct 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 LG768628909 or 768628909. Listed at 14 retailers as of November 1, 2026, with prices from £401 to £2,496, a £2,096 spread on the same certified stone. Brilliant Earth lists it at £2,496. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.29
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.7°
Pavilion angle33.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG768628909
Dimensions8.22 × 5.55 × 3.49 mm
L/W Ratio1.48
Culet sizePointed
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
8.22 mm5.55 mm1.29 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG768628909
Side View
Table 62.0%Crown 37.7°Girdle: MediumPavilion 33.5°Culet: NoneDepth 62.9%

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: Nov 1
Current: £2,496 GBP|Low: £401 GBP|High: £2,571 GBP|Avg: £940 GBP|-2.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 3, 2026
Retailer 5£401 GBP
Retailer 3£493 GBP
Retailer 10£525 GBP
Retailer 8£563 GBP
Retailer 6£602 GBP
Retailer 2£632 GBP
Retailer 12£674 GBP
Retailer 9£677 GBP
Retailer 11£804 GBP
Retailer 13£1,152 GBP
Retailer 4£1,348 GBP
Retailer 7£1,365 GBP
Brilliant Earth£2,496 GBP

44 data points across 13 retailers

14 retailers£401 GBP to £2,496 GBP

A
Cheapest Retailer
-
£401 GBP
HK$4,200 HKD
A
Retailer 2
-
£493 GBP
$662 USD
View
A
Retailer 3
-
£525 GBP
$705 USD
View
A
Retailer 4
-
£563 GBP
€720 EUR
View
A
Retailer 5
-
£602 GBP
ZAR 13,059 ZAR
View
B+
Retailer 6
-
£632 GBP
View
A
Retailer 7
-
£674 GBP
$904 USD
View
B+
Retailer 8
-
£677 GBP
A$1,398 AUD
View
B+
Retailer 9
-
£804 GBP
$1,078 USD
View
B+
Retailer 10
-
£1,152 GBP
$1,545 USD
View
B+
Retailer 11
-
£1,348 GBP
$1,809 USD
View
B+
Retailer 12
-
£1,365 GBP
View
Retailer 13
-
£1,765 GBP
$2,369 USD
View
Price last confirmed 75 days ago
Most Expensive
B
Brilliant Earth
18658590A · Nov 2
£2,496 GBP
$3,350 USD
View
13 more retailers have this diamond
Prices start from £401 GBPSave up to £2,096 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
1.29ct Radiant
£401 GBP