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Marquise|Lab Grown|IGI

1.35ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG780663952

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780663952

Diamond specifications and retailer prices

From £398 GBP
As of November 4, 2026
Save £1,358 GBP (77%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,756 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.35ct lab-grown marquise diamond

This 1.35ct 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 LG780663952 or 780663952. Listed at 13 retailers as of November 4, 2026, with prices from £398 to £1,756, a £1,358 spread on the same certified stone. Brilliant Earth lists it at £1,756. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.35
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780663952
Dimensions11.33 × 5.73 × 3.67 mm
L/W Ratio1.98
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
11.33 mm5.73 mm1.35 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780663952
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 64.0%

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 4
Current: £1,756 GBP|Low: £398 GBP|High: £2,867 GBP|Avg: £1,252 GBP|-38.8%
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
November 5, 2026
Retailer 7£398 GBP
Retailer 8£487 GBP
Retailer 2£616 GBP
Retailer 4£676 GBP
Retailer 5£772 GBP
Retailer 10£792 GBP
Retailer 12£800 GBP
Retailer 13£896 GBP
Retailer 9£996 GBP
Retailer 11£1,136 GBP
Retailer 6£1,342 GBP
Retailer 3£1,722 GBP
Brilliant Earth£1,756 GBP

45 data points across 13 retailers

13 retailers£398 GBP to £1,756 GBP

A
Cheapest Retailer
-
£398 GBP
A
Retailer 2
-
£487 GBP
View
A
Retailer 3
-
£616 GBP
View
A
Retailer 4
-
£676 GBP
View
B+
Retailer 5
-
£772 GBP
View
B+
Retailer 6
-
£792 GBP
View
A
Retailer 7
-
£800 GBP
View
Retailer 8
-
£896 GBP
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£996 GBP
View
B+
Retailer 10
-
£1,136 GBP
View
B+
Retailer 11
-
£1,342 GBP
View
Retailer 12
-
£1,722 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
19712353A · Nov 4
£1,756 GBP
$2,370 USD
View
12 more retailers have this diamond
Prices start from £398 GBPSave up to £1,358 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
1.35ct Marquise
£398 GBP