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Radiant|Lab Grown|IGI

1.39ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG825659912

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

Certificate IGI LG825659912

Diamond specifications and retailer prices

From £266 GBP
$354 USD
As of October 30, 2026
Save £2,836 GBP (91%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £3,101 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.39ct lab-grown radiant diamond

This 1.39ct 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 LG825659912 or 825659912. Listed at 19 retailers as of October 29, 2026, with prices from £266 to £3,101, a £2,836 spread on the same certified stone. Brilliant Earth lists it at £3,101. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.39
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.9°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825659912
Dimensions7.66 × 5.58 × 3.89 mm
L/W Ratio1.37
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
7.66 mm5.58 mm1.39 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825659912
Side View
Table 61.0%Crown 40.9°Girdle: MediumPavilion 38.3°Culet: NoneDepth 69.7%

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 30
Current: £3,101 GBP|Low: £248 GBP|High: £3,109 GBP|Avg: £959 GBP|-0.2%
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
Retailer 14
October 30, 2026
Retailer 9£266 GBP
Retailer 14£394 GBP
Retailer 11£454 GBP
Retailer 8£476 GBP
Retailer 2£490 GBP
Retailer 4£513 GBP
Retailer 13£749 GBP
Retailer 10£851 GBP
Retailer 5£867 GBP
Retailer 12£926 GBP
Retailer 6£1,022 GBP
Retailer 7£1,115 GBP
Retailer 3£2,350 GBP
Brilliant Earth£3,101 GBP

30 data points across 14 retailers

19 retailers£266 GBP to £3,101 GBP

A
Cheapest Retailer
-
£266 GBP
$354 USD
Final sale: no returns
Retailer 2
-
£296 GBP
$394 USD
View
Price last confirmed 28 days ago
Retailer 3
-
£345 GBP
$460 USD
View
Price last confirmed 32 days ago
Retailer 4
-
£382 GBP
$509 USD
View
Price last confirmed 27 days ago
A
Retailer 5
-
£394 GBP
$525 USD
View
A
Retailer 6
-
£454 GBP
$604 USD
View
A
Retailer 7
-
£476 GBP
ZAR 10,234 ZAR
View
A
Retailer 8
-
£490 GBP
View
A
Retailer 9
-
£513 GBP
€651 EUR
View
B+
Retailer 10
-
£749 GBP
$998 USD
View
B+
Retailer 11
-
£851 GBP
$1,133 USD
View
B+
Retailer 12
-
£867 GBP
$1,154 USD
View
B+
Retailer 13
-
£926 GBP
$1,233 USD
View
B+
Retailer 14
-
£1,022 GBP
SGD 1,839 SGD
View
B+
Retailer 15
-
£1,115 GBP
View
Retailer 16
-
£1,229 GBP
$1,636 USD
View
Price last confirmed 29 days ago
Retailer 17
-
£2,347 GBP
$3,125 USD
View
Price last confirmed 8 days ago
Retailer 18
-
£2,350 GBP
$3,130 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
21418725A · Oct 29
£3,101 GBP
$4,130 USD
View
18 more retailers have this diamond
Prices start from £266 GBPSave up to £2,836 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
1.39ct Radiant
£266 GBP