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Marquise|Lab Grown|IGI

1.55ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG799677033

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG799677033

Diamond specifications and retailer prices

From £712 GBP
As of November 4, 2026
Save £2,988 GBP (81%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £3,700 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 LG799677033 or 799677033. Listed at 24 retailers as of November 4, 2026, with prices from £712 to £3,700, a £2,988 spread on the same certified stone. Brilliant Earth lists it at £3,700. 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 angle34.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799677033
Dimensions11.65 × 6.11 × 3.80 mm
L/W Ratio1.91
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
11.65 mm6.11 mm1.55 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799677033
Side View
Table 59.0%Crown 34.5°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 62.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £3,700 GBP|Low: £712 GBP|High: £3,708 GBP|Avg: £1,665 GBP|-0.2%
Brilliant Earth
Retailer 2
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Retailer 22
November 5, 2026
Retailer 15£712 GBP
Retailer 5£775 GBP
Retailer 11£796 GBP
Retailer 4£826 GBP
Retailer 19£826 GBP
Retailer 22£952 GBP
Retailer 18£955 GBP
Retailer 3£960 GBP
Retailer 9£981 GBP
Retailer 2£1,260 GBP
Retailer 17£1,313 GBP
Retailer 10£1,322 GBP
Retailer 16£1,519 GBP
Retailer 21£1,780 GBP
Retailer 8£2,276 GBP
Retailer 20£2,322 GBP
Retailer 6£2,561 GBP
Retailer 12£2,684 GBP
Retailer 14£2,770 GBP
Retailer 13£2,800 GBP
Retailer 7£2,875 GBP
Brilliant Earth£3,700 GBP

40 data points across 22 retailers

24 retailers£712 GBP to £3,700 GBP

A
Cheapest Retailer
-
£712 GBP
A
Retailer 2
-
£775 GBP
View
A
Retailer 3
-
£796 GBP
View
Final sale: no returns
Retailer 4
-
£826 GBP
View
Price last confirmed 19 days ago
A
Retailer 5
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£826 GBP
View
A
Retailer 6
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£952 GBP
View
A
Retailer 7
-
£955 GBP
View
A
Retailer 8
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£960 GBP
View
A
Retailer 9
-
£981 GBP
View
A
Retailer 10
-
£1,260 GBP
View
Retailer 11
-
£1,313 GBP
View
Price last confirmed 9 days ago
A
Retailer 12
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£1,322 GBP
View
B+
Retailer 13
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£1,519 GBP
View
B+
Retailer 14
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£1,780 GBP
View
B+
Retailer 15
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£2,276 GBP
View
B
Retailer 16
-
£2,322 GBP
View
B+
Retailer 17
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£2,455 GBP
View
B
Retailer 18
-
£2,561 GBP
View
B
Retailer 19
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£2,684 GBP
View
B
Retailer 20
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£2,770 GBP
View
B
Retailer 21
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£2,800 GBP
View
Retailer 22
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£2,802 GBP
View
Price last confirmed 88 days ago
B
Retailer 23
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£2,875 GBP
View
Most Expensive
B
Brilliant Earth
20584022A · Nov 4
£3,700 GBP
$4,980 USD
View
23 more retailers have this diamond
Prices start from £712 GBPSave up to £2,988 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
£712 GBP