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Marquise|Lab Grown|IGI

1.34ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG790611745

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG790611745

Diamond specifications and retailer prices

From £320 GBP
As of November 4, 2026
Save £1,554 GBP (83%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,874 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 LG790611745 or 790611745. Listed at 22 retailers as of November 4, 2026, with prices from £320 to £1,874, a £1,554 spread on the same certified stone. Brilliant Earth lists it at £1,874. 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°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790611745
Dimensions11.12 × 5.84 × 3.62 mm
L/W Ratio1.90
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
11.12 mm5.84 mm1.34 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG790611745
Side View
Table 59.0%Crown 34.2°Girdle: MED-STKPavilion 40°Culet: NoneDepth 62.0%

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: £1,874 GBP|Low: £320 GBP|High: £2,704 GBP|Avg: £1,009 GBP|-30.7%
Brilliant Earth
Retailer 2
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November 5, 2026
Retailer 17£320 GBP
Retailer 9£358 GBP
Retailer 19£359 GBP
Retailer 4£397 GBP
Retailer 14£407 GBP
Retailer 8£436 GBP
Retailer 22£504 GBP
Retailer 3£570 GBP
Retailer 20£625 GBP
Retailer 12£646 GBP
Retailer 2£649 GBP
Retailer 18£684 GBP
Retailer 6£728 GBP
Retailer 16£1,114 GBP
Retailer 11£1,162 GBP
Retailer 10£1,261 GBP
Retailer 5£1,277 GBP
Retailer 7£1,300 GBP
Retailer 21£1,433 GBP
Retailer 13£1,455 GBP
Retailer 15£1,707 GBP
Brilliant Earth£1,874 GBP

33 data points across 22 retailers

22 retailers£320 GBP to £1,874 GBP

A
Cheapest Retailer
-
£320 GBP
A
Retailer 2
-
£358 GBP
View
Final sale: no returns
A
Retailer 3
-
£359 GBP
View
A
Retailer 4
-
£397 GBP
View
Retailer 5
-
£407 GBP
View
Price last confirmed 11 days ago
A
Retailer 6
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£436 GBP
View
A
Retailer 7
-
£504 GBP
View
A
Retailer 8
-
£570 GBP
View
A
Retailer 9
-
£625 GBP
View
Retailer 10
-
£646 GBP
View
Price last confirmed 9 days ago
A
Retailer 11
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£649 GBP
View
A
Retailer 12
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£684 GBP
View
A
Retailer 13
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£728 GBP
View
B+
Retailer 14
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£1,114 GBP
View
B+
Retailer 15
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£1,162 GBP
View
B+
Retailer 16
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£1,261 GBP
View
B
Retailer 17
-
£1,277 GBP
View
B+
Retailer 18
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£1,300 GBP
View
B
Retailer 19
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£1,433 GBP
View
B
Retailer 20
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£1,455 GBP
View
Retailer 21
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£1,707 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
19074176A · Nov 4
£1,874 GBP
$2,530 USD
View
21 more retailers have this diamond
Prices start from £320 GBPSave up to £1,554 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
£320 GBP