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Marquise|Lab Grown|IGI

1.27ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG780662340

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780662340

Diamond specifications and retailer prices

From £379 GBP
As of November 4, 2026
Save £1,391 GBP (79%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,870 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.27ct lab-grown marquise diamond

This 1.27ct lab-grown marquise 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 LG780662340 or 780662340. Listed at 14 retailers as of November 4, 2026, with a 367% 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780662340
Dimensions11.51 × 5.54 × 3.47 mm
L/W Ratio2.08
Girdle conditionFaceted
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
11.51 mm5.54 mm1.27 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780662340
Side View
Table 58.0%Crown 35.6°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £576 GBP|Low: £379 GBP|High: £2,526 GBP|Avg: £1,143 GBP|-32.6%
Retailer 1
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 5, 2026
Retailer 7£379 GBP
Retailer 9£461 GBP
Retailer 1£576 GBP
Retailer 4£647 GBP
Retailer 5£693 GBP
Retailer 11£744 GBP
Retailer 2£756 GBP
Retailer 13£849 GBP
Retailer 3£870 GBP
Retailer 12£1,077 GBP
Retailer 10£1,250 GBP
Retailer 6£1,269 GBP
Retailer 8£1,770 GBP

41 data points across 13 retailers

14 retailers£379 GBP to £1,770 GBP

A
Cheapest Retailer
-
£379 GBP
A
Retailer 2
-
£461 GBP
View
A
Retailer 3
-
£576 GBP
View
A
Retailer 4
-
£647 GBP
View
A
Retailer 5
-
£693 GBP
View
A
Retailer 6
-
£744 GBP
View
A
Retailer 7
-
£756 GBP
View
B+
Retailer 8
-
£849 GBP
View
B+
Retailer 9
-
£870 GBP
View
B+
Retailer 10
-
£1,077 GBP
View
B+
Retailer 11
-
£1,250 GBP
View
B+
Retailer 12
-
£1,269 GBP
View
B
Retailer 13
-
£1,770 GBP
View
Most Expensive
Rare Carat
52437 · Oct 28
£1,870 GBP
$2,525 USD
View
Price last confirmed 7 days ago
13 more retailers have this diamond
Prices start from £379 GBPSave up to £1,391 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 Marquise
£379 GBP