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Marquise|Lab Grown|IGI

1.59ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG823605084

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG823605084

Diamond specifications and retailer prices

From £925 GBP
$1,240 USD
As of October 30, 2026
4 retailers carry this diamond
Most expensive: £925 GBP at Brilliant Earth
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 LG823605084 or 823605084. Listed at 4 retailers as of October 30, 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

1.59
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG823605084
Dimensions11.95 × 6.10 × 3.82 mm
L/W Ratio1.96
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.95 mm6.10 mm1.59 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823605084
Side View
Table 63.0%Crown 34°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 30
Current: £925 GBP|Low: £395 GBP|High: £1,146 GBP|Avg: £643 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
September 29, 2026
Retailer 4£397 GBP
Retailer 5£442 GBP
Retailer 2£496 GBP
Brilliant Earth£925 GBP
Retailer 3£1,146 GBP

12 data points across 5 retailers

4 retailers

Retailer 1
-
£228 GBP
$305 USD
Price last confirmed 31 days ago
Retailer 2
-
£264 GBP
$354 USD
View
Price last confirmed 32 days ago
Retailer 3
-
£279 GBP
$374 USD
View
Price last confirmed 32 days ago
Most Expensive
B
Brilliant Earth
21067439A · Oct 30
£925 GBP
$1,240 USD
View
3 more retailers have this diamond

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
£925 GBP