Marquise|Lab Grown|IGI

1.21ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG816673640

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG816673640

Diamond specifications and retailer prices

From €168 EUR
$188 USD
As of October 30, 2026
Save €707 EUR (81%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: €875 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 1.21ct lab-grown marquise diamond

This 1.21ct lab-grown marquise sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG816673640 or 816673640. Listed at 8 retailers as of October 30, 2026, with prices from €168 to €875, a €707 spread on the same certified stone. MOH London lists it at €875. 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

1.21
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816673640
Dimensions11.44 × 5.59 × 3.44 mm
L/W Ratio2.05
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.44 mm5.59 mm1.21 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816673640
Side View
Table 61.0%Crown 33.3°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 61.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: €875 EUR|Low: €166 EUR|High: €876 EUR|Avg: €446 EUR|+1.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 5€168 EUR
Retailer 2€243 EUR
Retailer 3€333 EUR
Retailer 7€336 EUR
Retailer 4€355 EUR
Retailer 6€636 EUR
Retailer 8€651 EUR
MOH London€875 EUR

12 data points across 8 retailers

8 retailers€168 EUR to €875 EUR

A
Cheapest Retailer
-
€168 EUR
$188 USD
Final sale: no returns
A
Retailer 2
-
€243 EUR
£214 GBP
View
A
Retailer 3
-
€333 EUR
£293 GBP
View
A
Retailer 4
-
€336 EUR
$375 USD
View
A
Retailer 5
-
€355 EUR
$397 USD
View
B
Retailer 6
-
€636 EUR
$710 USD
View
B
Retailer 7
-
€651 EUR
$727 USD
View
Most Expensive
B
MOH London
LG816673640 · Nov 1
€875 EUR
£770 GBP
View
7 more retailers have this diamond
Prices start from €168 EURSave up to €707 EUR

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
1.21ct Marquise
€168 EUR