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Marquise|Lab Grown|IGI

1.55ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG811619399

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG811619399

Diamond specifications and retailer prices

From £764 GBP
As of November 4, 2026
Save £2,944 GBP (79%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £3,708 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.55ct lab-grown marquise diamond

This 1.55ct lab-grown marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG811619399 or 811619399. Listed at 25 retailers as of November 4, 2026, with prices from £764 to £3,708, a £2,944 spread on the same certified stone. Brilliant Earth lists it at £3,708. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811619399
Dimensions9.35 × 6.66 × 4.01 mm
L/W Ratio1.40
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
9.35 mm6.66 mm1.55 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811619399
Side View
Table 60.0%Crown 32.9°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 60.2%

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: £3,708 GBP|Low: £733 GBP|High: £3,708 GBP|Avg: £1,605 GBP|+0.2%
Brilliant Earth
Retailer 2
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Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 16
November 5, 2026
Retailer 5£764 GBP
Retailer 16£831 GBP
Retailer 3£886 GBP
Retailer 4£886 GBP
Retailer 10£999 GBP
Retailer 14£1,014 GBP
Retailer 11£1,250 GBP
Retailer 9£1,265 GBP
Retailer 7£1,267 GBP
Retailer 15£1,451 GBP
Retailer 12£1,629 GBP
Retailer 6£1,661 GBP
Retailer 13£1,709 GBP
Retailer 8£2,615 GBP
Retailer 2£2,996 GBP
Brilliant Earth£3,708 GBP

37 data points across 16 retailers

25 retailers£764 GBP to £3,708 GBP

A
Cheapest Retailer
-
£764 GBP
A
Retailer 2
-
£831 GBP
View
A
Retailer 3
-
£855 GBP
View
Final sale: no returns
A
Retailer 4
-
£886 GBP
View
Retailer 5
-
£886 GBP
View
Price last confirmed 19 days ago
A
Retailer 6
-
£970 GBP
View
A
Retailer 7
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£999 GBP
View
A
Retailer 8
-
£1,014 GBP
View
A
Retailer 9
-
£1,036 GBP
View
B+
Retailer 10
-
£1,250 GBP
View
A
Retailer 11
-
£1,265 GBP
View
A
Retailer 12
-
£1,267 GBP
View
Retailer 13
-
£1,451 GBP
View
Price last confirmed 7 days ago
B+
Retailer 14
-
£1,629 GBP
View
B+
Retailer 15
-
£1,661 GBP
View
B+
Retailer 16
-
£1,709 GBP
View
B+
Retailer 17
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£1,852 GBP
View
B
Retailer 18
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£2,445 GBP
View
B
Retailer 19
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£2,615 GBP
View
B
Retailer 20
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£2,746 GBP
View
B
Retailer 21
-
£2,849 GBP
View
B
Retailer 22
-
£2,968 GBP
View
B
Retailer 23
-
£2,996 GBP
View
B
Retailer 24
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£3,090 GBP
View
Most Expensive
B
Brilliant Earth
20637611A · Nov 4
£3,708 GBP
$4,990 USD
View
24 more retailers have this diamond
Prices start from £764 GBPSave up to £2,944 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
1.55ct Marquise
£764 GBP