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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 $464 USD
As of November 1, 2026
Save $621 USD (57%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,085 USD 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 $464 to $1,085, a $621 spread on the same certified stone. MOH London lists it at $1,085. 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
Color
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: $1,085 USD|Low: $439 USD|High: $1,097 USD|Avg: $634 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 3$464 USD
Retailer 2$498 USD
Retailer 4$536 USD
Retailer 5$617 USD
MOH London$1,085 USD

41 data points across 5 retailers

5 retailers$464 USD to $1,085 USD

B+
Cheapest Retailer
-
$464 USD
A
Retailer 2
-
$498 USD
£392 GBP
View
A
Retailer 3
-
$536 USD
View
B+
Retailer 4
-
$617 USD
View
Most Expensive
B
MOH London
LG761514334 · Nov 1
$1,085 USD
£854 GBP
View
4 more retailers have this diamond
Prices start from $464 USDSave up to $621 USD

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
$464 USD