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Marquise|Lab Grown|IGI

1.34ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG787620980

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG787620980

Diamond specifications and retailer prices

From £398 GBP
As of November 4, 2026
Save £1,432 GBP (78%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,830 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.34ct lab-grown marquise diamond

This 1.34ct 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 LG787620980 or 787620980. Listed at 14 retailers as of November 4, 2026, with prices from £398 to £1,830, a £1,432 spread on the same certified stone. Brilliant Earth lists it at £1,830. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.34
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG787620980
Dimensions11.49 × 5.68 × 3.58 mm
L/W Ratio2.02
Girdle conditionFaceted
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
11.49 mm5.68 mm1.34 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787620980
Side View
Table 61.0%Crown 34.2°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 63.0%

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 4
Current: £1,830 GBP|Low: £398 GBP|High: £2,963 GBP|Avg: £1,253 GBP|-38.3%
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
November 5, 2026
Retailer 8£398 GBP
Retailer 9£483 GBP
Retailer 2£612 GBP
Retailer 4£672 GBP
Retailer 5£761 GBP
Retailer 11£786 GBP
Retailer 14£795 GBP
Retailer 13£893 GBP
Retailer 6£909 GBP
Retailer 12£1,128 GBP
Retailer 10£1,319 GBP
Retailer 7£1,333 GBP
Retailer 3£1,707 GBP
Brilliant Earth£1,830 GBP

44 data points across 14 retailers

14 retailers£398 GBP to £1,830 GBP

A
Cheapest Retailer
-
£398 GBP
A
Retailer 2
-
£483 GBP
View
A
Retailer 3
-
£612 GBP
View
A
Retailer 4
-
£672 GBP
View
B+
Retailer 5
-
£761 GBP
View
B+
Retailer 6
-
£786 GBP
View
A
Retailer 7
-
£795 GBP
View
B+
Retailer 8
-
£893 GBP
View
B+
Retailer 9
-
£909 GBP
View
B+
Retailer 10
-
£1,128 GBP
View
B+
Retailer 11
-
£1,319 GBP
View
B+
Retailer 12
-
£1,333 GBP
View
Retailer 13
-
£1,707 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
19712375A · Nov 4
£1,830 GBP
$2,470 USD
View
13 more retailers have this diamond
Prices start from £398 GBPSave up to £1,432 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
1.34ct Marquise
£398 GBP