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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 $301 NZD
As of November 6, 2026
Save $1,439 NZD (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,740 NZD 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 11 retailers as of November 1, 2026, with prices from $301 to $1,740, a $1,439 spread on the same certified stone. MOH London lists it at $1,740. 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
Colour
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

How it works →
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: Nov 6
Current: $1,740 NZD|Low: $301 NZD|High: $1,742 NZD|Avg: $882 NZD|+1.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 4$301 NZD
Retailer 9$334 NZD
Retailer 5$349 NZD
Retailer 6$479 NZD
Retailer 7$655 NZD
Retailer 11$667 NZD
Retailer 8$706 NZD
Retailer 2$1,195 NZD
Retailer 10$1,263 NZD
Retailer 3$1,293 NZD
MOH London$1,740 NZD

17 data points across 11 retailers

11 retailers$301 NZD to $1,740 NZD

Cheapest Retailer
-
$301 NZD
A
Retailer 2
-
$334 NZD
View
Final sale: no returns
Retailer 3
-
$349 NZD
View
A
Retailer 4
-
$479 NZD
View
A
Retailer 5
-
$655 NZD
View
A
Retailer 6
-
$667 NZD
View
B+
Retailer 7
-
$706 NZD
View
Retailer 8
-
$1,195 NZD
View
B
Retailer 9
-
$1,263 NZD
View
B
Retailer 10
-
$1,293 NZD
View
Most Expensive
B
MOH London
LG816673640 · Nov 1
$1,740 NZD
£770 GBP
View
10 more retailers have this diamond
Prices start from $301 NZDSave up to $1,439 NZD

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
$301 NZD