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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 HK$1,326 HKD
As of November 6, 2026
Save HK$6,346 HKD (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$7,672 HKD 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 HK$1,326 to HK$7,672, a HK$6,346 spread on the same certified stone. MOH London lists it at HK$7,672. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: HK$7,672 HKD|Low: HK$1,326 HKD|High: HK$7,682 HKD|Avg: HK$3,888 HKD|+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 4HK$1,326 HKD
Retailer 9HK$1,475 HKD
Retailer 5HK$1,538 HKD
Retailer 6HK$2,110 HKD
Retailer 7HK$2,887 HKD
Retailer 11HK$2,942 HKD
Retailer 8HK$3,115 HKD
Retailer 2HK$5,272 HKD
Retailer 10HK$5,570 HKD
Retailer 3HK$5,703 HKD
MOH LondonHK$7,672 HKD

17 data points across 11 retailers

11 retailersHK$1,326 HKD to HK$7,672 HKD

Cheapest Retailer
-
HK$1,326 HKD
A
Retailer 2
-
HK$1,475 HKD
View
Final sale: no returns
Retailer 3
-
HK$1,538 HKD
View
A
Retailer 4
-
HK$2,110 HKD
View
A
Retailer 5
-
HK$2,887 HKD
View
A
Retailer 6
-
HK$2,942 HKD
View
B+
Retailer 7
-
HK$3,115 HKD
View
Retailer 8
-
HK$5,272 HKD
View
B
Retailer 9
-
HK$5,570 HKD
View
B
Retailer 10
-
HK$5,703 HKD
View
Most Expensive
B
MOH London
LG816673640 · Nov 1
HK$7,672 HKD
£770 GBP
View
10 more retailers have this diamond
Prices start from HK$1,326 HKDSave up to HK$6,346 HKD

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
HK$1,326 HKD