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Radiant|Lab Grown|IGI

1.27ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG799643654

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

Certificate IGI LG799643654

Diamond specifications and retailer prices

From £249 GBP
As of November 2, 2026
Save £1,450 GBP (85%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,829 GBP at Rare Carat · As of October 18, 2026
View at Rare Carat

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 LG799643654 or 799643654. Listed at 8 retailers as of November 1, 2026, with a 582% 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

1.27
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799643654
Dimensions7.86 × 5.30 × 3.60 mm
L/W Ratio1.48
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 mm5.30 mm1.27 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799643654
Side View
Table 60.0%Crown 37.2°Girdle: STK-THKPavilion 36°Culet: NoneDepth 67.9%

Caratlytics Score

How it works →
A+
Exceptional
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 2
Current: £1,829 GBP|Low: £226 GBP|High: £2,437 GBP|Avg: £902 GBP|+5.4%
Rare Carat
Retailer 2
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Retailer 12
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November 2, 2026
Retailer 3£226 GBP
Retailer 2£249 GBP
Retailer 14£370 GBP
Retailer 4£507 GBP
Retailer 6£569 GBP
Retailer 5£582 GBP
Retailer 17£617 GBP
Retailer 7£657 GBP
Retailer 16£686 GBP
Retailer 13£707 GBP
Retailer 15£815 GBP
Retailer 10£970 GBP
Retailer 8£1,160 GBP
Retailer 9£1,272 GBP
Retailer 11£1,490 GBP
Retailer 12£1,699 GBP
Rare Carat£1,829 GBP

23 data points across 17 retailers

8 retailers£249 GBP to £1,699 GBP

A+
Cheapest Retailer
-
£249 GBP
A
Retailer 2
-
£370 GBP
$497 USD
View
B+
Retailer 3
-
£707 GBP
$949 USD
View
B+
Retailer 4
-
£815 GBP
$1,094 USD
View
B+
Retailer 5
-
£970 GBP
View
B
Retailer 6
-
£1,490 GBP
$2,000 USD
View
B
Retailer 7
-
£1,699 GBP
$2,280 USD
View
Most Expensive
Rare Carat
PE-181677 · Oct 18
£1,829 GBP
$2,455 USD
View
Price last confirmed 15 days ago
7 more retailers have this diamond
Prices start from £249 GBPSave up to £1,450 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
£249 GBP