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Cushion|Lab Grown|IGI

1.21ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG840633344

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840633344

Diamond specifications and retailer prices

From HK$3,554 HKD
$453 USD
As of November 1, 2026
Save HK$14,726 HKD (81%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: HK$18,280 HKD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.21ct lab-grown cushion diamond

This 1.21ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840633344 or 840633344. Listed at 17 retailers as of October 31, 2026, with prices from HK$3,554 to HK$18,280, a HK$14,726 spread on the same certified stone. Brilliant Earth lists it at HK$18,280. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840633344
Dimensions7.66 × 5.47 × 3.61 mm
L/W Ratio1.40
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
7.66 mm5.47 mm1.21 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840633344
Side View
Table 61.0%Crown 32.5°Girdle: MED-STKPavilion 37.5°Culet: NoneDepth 66.0%

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 1
Current: HK$18,280 HKD|Low: HK$3,554 HKD|High: HK$19,850 HKD|Avg: HK$9,546 HKD|-7.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 3HK$3,554 HKD
Retailer 16HK$3,829 HKD
Retailer 10HK$3,940 HKD
Retailer 13HK$4,982 HKD
Retailer 5HK$5,641 HKD
Retailer 6HK$6,080 HKD
Retailer 11HK$6,225 HKD
Retailer 17HK$6,426 HKD
Retailer 15HK$6,576 HKD
Retailer 12HK$6,648 HKD
Retailer 14HK$9,195 HKD
Retailer 8HK$12,318 HKD
Retailer 4HK$12,588 HKD
Retailer 7HK$13,278 HKD
Retailer 2HK$14,956 HKD
Retailer 9HK$18,194 HKD
Brilliant EarthHK$18,280 HKD

25 data points across 17 retailers

17 retailersHK$3,554 HKD to HK$18,280 HKD

A
Cheapest Retailer
-
HK$3,554 HKD
$453 USD
Final sale: no returns
Retailer 2
-
HK$3,829 HKD
$488 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
HK$3,940 HKD
£395 GBP
View
A
Retailer 4
-
HK$4,982 HKD
$635 USD
View
A
Retailer 5
-
HK$5,641 HKD
$719 USD
View
A
Retailer 6
-
HK$6,080 HKD
$775 USD
View
A
Retailer 7
-
HK$6,225 HKD
£625 GBP
View
A
Retailer 8
-
HK$6,426 HKD
$819 USD
View
A
Retailer 9
-
HK$6,576 HKD
ZAR 13,540 ZAR
View
A
Retailer 10
-
HK$6,648 HKD
€807 EUR
View
B+
Retailer 11
-
HK$9,195 HKD
$1,172 USD
View
Retailer 12
-
HK$12,318 HKD
$1,570 USD
View
Price last confirmed 18 days ago
B+
Retailer 13
-
HK$12,588 HKD
$1,604 USD
View
B+
Retailer 14
-
HK$13,278 HKD
SGD 2,287 SGD
View
B+
Retailer 15
-
HK$14,956 HKD
£1,501 GBP
View
B
Retailer 16
-
HK$18,194 HKD
$2,319 USD
View
Most Expensive
B
Brilliant Earth
21729045A · Oct 31
HK$18,280 HKD
$2,330 USD
View
16 more retailers have this diamond
Prices start from HK$3,554 HKDSave up to HK$14,726 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 Cushion
HK$3,554 HKD