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Marquise|Lab Grown|IGI

1.43ct H SI1 Marquise Lab Grown Diamond

ID • H/SI1 • IGI LG436072886

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG436072886

Diamond specifications and retailer prices

From £598 GBP
As of November 6, 2026
Save £2,002 GBP (77%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,601 GBP at MOH London · As of November 3, 2026
View at MOH London

About this 1.43ct lab-grown marquise diamond

This 1.43ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436072886 or 436072886. Listed at 12 retailers as of November 3, 2026, with prices from £598 to £2,601, a £2,002 spread on the same certified stone. MOH London lists it at £2,601. 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

1.43
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.2°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436072886
Dimensions10.73 × 5.94 × 3.82 mm
L/W Ratio1.81
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
10.73 mm5.94 mm1.43 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG436072886
Side View
Table 57.5%Crown 36.2°Girdle: ThickPavilion 40.8°Culet: NoneDepth 64.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,601 GBP|Low: £574 GBP|High: £2,635 GBP|Avg: £1,249 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 8£598 GBP
Retailer 11£670 GBP
Retailer 9£694 GBP
Retailer 2£713 GBP
Retailer 5£803 GBP
Retailer 4£820 GBP
Retailer 6£825 GBP
Retailer 13£1,080 GBP
Retailer 10£1,119 GBP
Retailer 7£1,650 GBP
Retailer 3£1,986 GBP
Retailer 12£2,123 GBP
MOH London£2,601 GBP

21 data points across 13 retailers

12 retailers£598 GBP to £2,601 GBP

B+
Cheapest Retailer
-
£598 GBP
B+
Retailer 2
-
£651 GBP
View
B+
Retailer 3
-
£670 GBP
View
Final sale: no returns
B+
Retailer 4
-
£694 GBP
View
Retailer 5
-
£694 GBP
View
Price last confirmed 25 days ago
B+
Retailer 6
-
£713 GBP
View
B+
Retailer 7
-
£825 GBP
View
B+
Retailer 8
-
£1,119 GBP
View
B+
Retailer 9
-
£1,650 GBP
View
B+
Retailer 10
-
£1,950 GBP
View
B+
Retailer 11
-
£2,123 GBP
View
Most Expensive
B+
MOH London
LG436072886 · Nov 3
£2,601 GBP
View
11 more retailers have this diamond
Prices start from £598 GBPSave up to £2,002 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.

B+
1.43ct Marquise
£598 GBP