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Marquise|Lab Grown|IGI

1.54ct H SI1 Marquise Lab Grown Diamond

ID • H/SI1 • IGI LG436045125

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG436045125

Diamond specifications and retailer prices

From £854 GBP
As of November 6, 2026
3 retailers carry this diamond
Most expensive: £1,187 GBP at The Perfect Carat · As of September 29, 2026
View at The Perfect Carat

About this 1.54ct lab-grown marquise diamond

This 1.54ct lab-grown marquise sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436045125 or 436045125. Listed at 3 retailers as of November 6, 2026. 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

1.54
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32.6°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045125
Dimensions11.42 × 6.34 × 3.77 mm
L/W Ratio1.80
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
11.42 mm6.34 mm1.54 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG436045125
Side View
Table 60.0%Crown 32.6°Girdle: MED-THKPavilion 40.7°Culet: NoneDepth 59.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £1,808 GBP|Low: £854 GBP|High: £3,664 GBP|Avg: £1,869 GBP|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
The Perfect Carat
October 9, 2026
Retailer 8£854 GBP
Retailer 7£1,091 GBP
The Perfect Carat£1,187 GBP
Retailer 13£1,222 GBP
Retailer 9£1,266 GBP
Retailer 12£1,266 GBP
Retailer 3£1,393 GBP
Retailer 4£1,719 GBP
Retailer 1£1,808 GBP
Retailer 10£1,996 GBP
Retailer 2£2,298 GBP
Retailer 11£2,373 GBP
Retailer 5£3,625 GBP
Retailer 6£3,664 GBP

16 data points across 14 retailers

3 retailers

A
Cheapest Retailer
-
£854 GBP
Retailer 2
-
£1,091 GBP
View
Price last confirmed 29 days ago
Most Expensive
The Perfect Carat
tpc_735088a1-4d92-4e62-a57b-d3d2ee2f88a7 · Sep 29
£1,187 GBP
$1,598 USD
View
Price last confirmed 38 days ago
2 more retailers have this diamond
Prices start from £854 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
1.54ct Marquise
£854 GBP