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Marquise|Lab Grown|IGI

1.80ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG761514334

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG761514334

Diamond specifications and retailer prices

From £346 GBP
$464 USD
As of November 1, 2026
Save £462 GBP (57%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £808 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.8ct lab-grown marquise diamond

This 1.8ct 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 LG761514334 or 761514334. Listed at 5 retailers as of November 1, 2026, with prices from £346 to £808, a £462 spread on the same certified stone. MOH London lists it at £808. 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

1.80
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG761514334
Dimensions11.98 × 6.31 × 4.09 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.98 mm6.31 mm1.80 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG761514334
Side View
Table 59.0%Crown 34°Girdle: STK-THKPavilion 41°Culet: NoneDepth 64.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £808 GBP|Low: £327 GBP|High: £818 GBP|Avg: £473 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 3£346 GBP
Retailer 2£371 GBP
Retailer 4£399 GBP
Retailer 5£460 GBP
MOH London£808 GBP

41 data points across 5 retailers

5 retailers£346 GBP to £808 GBP

B+
Cheapest Retailer
-
£346 GBP
$464 USD
A
Retailer 2
-
£371 GBP
View
A
Retailer 3
-
£399 GBP
$536 USD
View
B+
Retailer 4
-
£460 GBP
$617 USD
View
Most Expensive
B
MOH London
LG761514334 · Nov 1
£808 GBP
View
4 more retailers have this diamond
Prices start from £346 GBPSave up to £462 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
1.80ct Marquise
£346 GBP