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Marquise|Lab Grown|IGI

1.55ct F FL Marquise Lab Grown Diamond

ID • F/FL • IGI LG794620705

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG794620705

Diamond specifications and retailer prices

From £436 GBP
As of November 4, 2026
Save £3,435 GBP (89%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,871 GBP at Do Amore Diamonds · As of November 5, 2026
View at Do Amore Diamonds

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 F colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG794620705 or 794620705. Listed at 15 retailers as of November 4, 2026, with prices from £436 to £3,871, a £3,435 spread on the same certified stone. Do Amore Diamonds lists it at £3,871. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
F
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794620705
Dimensions11.52 × 6.02 × 3.85 mm
L/W Ratio1.91
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
11.52 mm6.02 mm1.55 ctF / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG794620705
Side View
Table 59.0%Crown 35.4°Girdle: MED-STKPavilion 40.5°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: £3,871 GBP|Low: £436 GBP|High: £5,201 GBP|Avg: £1,798 GBP|-25.6%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
November 5, 2026
Retailer 12£436 GBP
Retailer 6£517 GBP
Retailer 8£519 GBP
Retailer 2£611 GBP
Retailer 9£711 GBP
Retailer 13£722 GBP
Retailer 3£903 GBP
Retailer 4£1,382 GBP
Retailer 15£1,530 GBP
Retailer 14£1,570 GBP
Retailer 5£1,768 GBP
Retailer 11£1,836 GBP
Retailer 10£2,346 GBP
Retailer 7£2,392 GBP
Do Amore Diamonds£3,871 GBP

38 data points across 15 retailers

15 retailers£436 GBP to £3,871 GBP

A
Cheapest Retailer
-
£436 GBP
A
Retailer 2
-
£517 GBP
View
A
Retailer 3
-
£519 GBP
View
Final sale: no returns
A
Retailer 4
-
£611 GBP
View
A
Retailer 5
-
£711 GBP
View
A
Retailer 6
-
£722 GBP
View
A
Retailer 7
-
£903 GBP
View
B+
Retailer 8
-
£1,382 GBP
View
B+
Retailer 9
-
£1,530 GBP
View
B+
Retailer 10
-
£1,570 GBP
View
B+
Retailer 11
-
£1,768 GBP
View
B
Retailer 12
-
£1,836 GBP
View
B
Retailer 13
-
£2,346 GBP
View
B
Retailer 14
-
£2,392 GBP
View
Most Expensive
B
Do Amore Diamonds
27-989581854 · Nov 5
£3,871 GBP
$5,210 USD
View
14 more retailers have this diamond
Prices start from £436 GBPSave up to £3,435 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
£436 GBP