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Marquise|Lab Grown|IGI

1.59ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG751508885

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG751508885

Diamond specifications and retailer prices

From £924 GBP
$1,230 USD
As of October 28, 2026
1 retailer carries this diamond
Only listing: £924 GBP at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

About this 1.59ct lab-grown marquise diamond

This 1.59ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG751508885 or 751508885. Listed at a single retailer as of October 28, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

1.59
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG751508885
Dimensions12.25 × 5.98 × 3.78 mm
L/W Ratio2.05
Girdle conditionFaceted
Culet sizePointed
Top View
12.25 mm5.98 mm1.59 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG751508885
Side View
Table 62.0%Crown 37.2°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 63.2%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 28
Current: £924 GBP|Low: £196 GBP|High: £954 GBP|Avg: £514 GBP|-3.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
August 18, 2026
Retailer 3£198 GBP
Retailer 5£310 GBP
Retailer 8£364 GBP
Retailer 6£382 GBP
Retailer 4£513 GBP
Retailer 2£573 GBP
Retailer 7£650 GBP
Retailer 9£731 GBP
Brilliant Earth£924 GBP

40 data points across 9 retailers

1 retailer

B
Brilliant Earth
17050784AB · Oct 28
£924 GBP
$1,230 USD
View

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
1.59ct Marquise
£924 GBP