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Marquise|Lab Grown|IGI

1.58ct G SI1 Marquise Lab Grown Diamond

EX • G/SI1 • IGI LG839622196

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG839622196

Diamond specifications and retailer prices

From £161 GBP
$216 USD
As of November 1, 2026
Save £1,108 GBP (87%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,269 GBP at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

About this 1.58ct lab-grown marquise diamond

This 1.58ct lab-grown marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG839622196 or 839622196. Listed at 3 retailers as of October 26, 2026, with prices from £161 to £1,269, a £1,108 spread on the same certified stone. Brilliant Earth lists it at £1,269. 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

1.58
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839622196
Dimensions12.33 × 6.12 × 3.79 mm
L/W Ratio2.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.33 mm6.12 mm1.58 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839622196
Side View
Table 59.0%Crown 34.4°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 61.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £1,269 GBP|Low: £161 GBP|High: £1,269 GBP|Avg: £693 GBP
Brilliant Earth
Retailer 2
Retailer 3
October 27, 2026
Retailer 2£161 GBP
Retailer 3£338 GBP
Brilliant Earth£1,269 GBP

27 data points across 3 retailers

3 retailers£161 GBP to £1,269 GBP

A
Cheapest Retailer
-
£161 GBP
$216 USD
Final sale: no returns
A
Retailer 2
-
£338 GBP
View
Most Expensive
B
Brilliant Earth
21552220A · Oct 26
£1,269 GBP
$1,700 USD
View
2 more retailers have this diamond
Prices start from £161 GBPSave up to £1,108 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
1.58ct Marquise
£161 GBP