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Marquise|Lab Grown|IGI

1.21ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG811609663

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG811609663

Diamond specifications and retailer prices

From HK$3,311 HKD
As of November 4, 2026
Save HK$6,590 HKD (67%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$12,396 HKD at Rare Carat · As of October 21, 2026
View at Rare Carat

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 LG811609663 or 811609663. Listed at 9 retailers as of October 29, 2026, with a 199% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle37.2°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811609663
Dimensions10.54 × 5.62 × 3.47 mm
L/W Ratio1.88
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
10.54 mm5.62 mm1.21 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811609663
Side View
Table 60.0%Crown 37.2°Girdle: MED-STKPavilion 39.9°Culet: NoneDepth 61.7%

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$12,396 HKD|Low: HK$3,209 HKD|High: HK$19,607 HKD|Avg: HK$6,985 HKD|+0.1%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 4, 2026
Retailer 9HK$3,209 HKD
Retailer 8HK$3,311 HKD
Retailer 4HK$4,213 HKD
Retailer 6HK$4,433 HKD
Retailer 2HK$4,637 HKD
Retailer 5HK$6,175 HKD
Retailer 7HK$8,301 HKD
Retailer 3HK$9,901 HKD
Rare CaratHK$12,396 HKD

39 data points across 9 retailers

9 retailersHK$3,311 HKD to HK$9,901 HKD

Retailer 1
-
HK$3,209 HKD
Price last confirmed 61 days ago
A
Retailer 2
-
HK$3,311 HKD
View
Retailer 3
-
HK$4,213 HKD
View
Price last confirmed 8 days ago
A
Retailer 4
-
HK$4,433 HKD
View
A
Retailer 5
-
HK$4,637 HKD
View
B+
Retailer 6
-
HK$6,175 HKD
View
B+
Retailer 7
-
HK$8,301 HKD
View
B+
Retailer 8
-
HK$9,901 HKD
View
Most Expensive
Rare Carat
NJ27 76A · Oct 21
HK$12,396 HKD
$1,580 USD
View
Price last confirmed 14 days ago
8 more retailers have this diamond
Prices start from HK$3,311 HKDSave up to HK$6,590 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$3,311 HKD