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Radiant|Lab Grown|IGI

1.27ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG831604107

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

Certificate IGI LG831604107

Diamond specifications and retailer prices

From £276 GBP
$370 USD
As of November 1, 2026
Save £2,183 GBP (89%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £2,459 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.27ct lab-grown radiant diamond

This 1.27ct 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 LG831604107 or 831604107. Listed at 16 retailers as of November 1, 2026, with prices from £276 to £2,459, a £2,183 spread on the same certified stone. Brilliant Earth lists it at £2,459. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.27
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.9°
Pavilion angle32.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831604107
Dimensions7.86 × 5.25 × 3.47 mm
L/W Ratio1.50
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
7.86 mm5.25 mm1.27 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831604107
Side View
Table 65.0%Crown 42.9°Girdle: MediumPavilion 32.3°Culet: NoneDepth 66.1%

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: Nov 1
Current: £2,459 GBP|Low: £276 GBP|High: £2,459 GBP|Avg: £875 GBP
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
Retailer 15
Retailer 16
November 2, 2026
Retailer 5£276 GBP
Retailer 9£315 GBP
Retailer 4£334 GBP
Retailer 8£417 GBP
Retailer 14£421 GBP
Retailer 10£528 GBP
Retailer 16£531 GBP
Retailer 11£548 GBP
Retailer 15£645 GBP
Retailer 2£725 GBP
Retailer 6£979 GBP
Retailer 3£1,016 GBP
Retailer 7£1,104 GBP
Retailer 13£1,201 GBP
Retailer 12£1,227 GBP
Brilliant Earth£2,459 GBP

17 data points across 16 retailers

16 retailers£276 GBP to £2,459 GBP

A
Cheapest Retailer
-
£276 GBP
$370 USD
Final sale: no returns
A
Retailer 2
-
£315 GBP
View
A
Retailer 3
-
£334 GBP
HK$3,500 HKD
View
A
Retailer 4
-
£417 GBP
$560 USD
View
A
Retailer 5
-
£421 GBP
$565 USD
View
A
Retailer 6
-
£528 GBP
ZAR 11,438 ZAR
View
A
Retailer 7
-
£531 GBP
€679 EUR
View
A
Retailer 8
-
£548 GBP
View
B+
Retailer 9
-
£645 GBP
$865 USD
View
B+
Retailer 10
-
£725 GBP
$973 USD
View
B+
Retailer 11
-
£979 GBP
SGD 1,776 SGD
View
B+
Retailer 12
-
£1,016 GBP
$1,364 USD
View
B+
Retailer 13
-
£1,104 GBP
$1,482 USD
View
B+
Retailer 14
-
£1,201 GBP
$1,612 USD
View
B+
Retailer 15
-
£1,227 GBP
View
Most Expensive
B
Brilliant Earth
22154082A · Nov 2
£2,459 GBP
$3,300 USD
View
15 more retailers have this diamond
Prices start from £276 GBPSave up to £2,183 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
1.27ct Radiant
£276 GBP