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Marquise|Lab Grown|IGI

1.55ct K SI1 Marquise Lab Grown Diamond

EX • K/SI1 • IGI LG436072673

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG436072673

Diamond specifications and retailer prices

From £698 GBP
As of November 6, 2026
Save £2,043 GBP (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £2,741 GBP at MOH London · As of November 5, 2026
View at MOH London

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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436072673 or 436072673. Listed at 9 retailers as of November 5, 2026, with prices from £698 to £2,741, a £2,043 spread on the same certified stone. MOH London lists it at £2,741. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.55
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436072673
Dimensions11.27 × 6.26 × 3.85 mm
L/W Ratio1.80
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
11.27 mm6.26 mm1.55 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG436072673
Side View
Table 61.5%Crown 34°Girdle: MED-THKPavilion 40.6°Culet: NoneDepth 61.5%

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 6
Current: £2,741 GBP|Low: £671 GBP|High: £2,785 GBP|Avg: £1,443 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 4£698 GBP
Retailer 5£811 GBP
Retailer 8£886 GBP
Retailer 2£940 GBP
Retailer 7£1,194 GBP
Retailer 6£1,297 GBP
Retailer 3£1,747 GBP
Retailer 9£2,320 GBP
MOH London£2,741 GBP

19 data points across 9 retailers

9 retailers£698 GBP to £2,741 GBP

A
Cheapest Retailer
-
£698 GBP
A
Retailer 2
-
£760 GBP
View
Retailer 3
-
£811 GBP
View
Price last confirmed 25 days ago
B+
Retailer 4
-
£811 GBP
View
B+
Retailer 5
-
£940 GBP
View
B+
Retailer 6
-
£1,297 GBP
View
B
Retailer 7
-
£1,747 GBP
View
B
Retailer 8
-
£2,279 GBP
View
Most Expensive
B
MOH London
LG436072673 · Nov 5
£2,741 GBP
View
8 more retailers have this diamond
Prices start from £698 GBPSave up to £2,043 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
£698 GBP