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Marquise|Lab Grown|IGI

1.21ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG850604581

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG850604581

Diamond specifications and retailer prices

From HK$3,013 HKD
As of November 4, 2026
Save HK$12,443 HKD (81%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: HK$15,456 HKD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG850604581 or 850604581. Listed at 7 retailers as of November 4, 2026, with prices from HK$3,013 to HK$15,456, a HK$12,443 spread on the same certified stone. Brilliant Earth lists it at HK$15,456. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850604581
Dimensions10.81 × 5.54 × 3.51 mm
L/W Ratio1.95
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.81 mm5.54 mm1.21 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850604581
Side View
Table 60.0%Crown 36.9°Girdle: MED-STKPavilion 40°Culet: NoneDepth 63.4%

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 4
Current: HK$3,013 HKD|Low: HK$3,013 HKD|High: HK$9,807 HKD|Avg: HK$6,965 HKD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 4, 2026
Retailer 1HK$3,013 HKD
Retailer 3HK$3,703 HKD
Retailer 6HK$5,845 HKD
Retailer 4HK$8,842 HKD
Retailer 2HK$8,858 HKD
Retailer 5HK$9,807 HKD

2 data points across 6 retailers

7 retailersHK$3,013 HKD to HK$15,456 HKD

A
Cheapest Retailer
-
HK$3,013 HKD
A
Retailer 2
-
HK$3,703 HKD
View
B+
Retailer 3
-
HK$5,845 HKD
View
B+
Retailer 4
-
HK$8,842 HKD
View
B+
Retailer 5
-
HK$8,858 HKD
View
B
Retailer 6
-
HK$9,807 HKD
View
Most Expensive
D
Brilliant Earth
22500800A · Nov 4
HK$15,456 HKD
$1,970 USD
View
6 more retailers have this diamond
Prices start from HK$3,013 HKDSave up to HK$12,443 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$3,013 HKD