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Cushion|Lab Grown|IGI

1.51ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG626419440

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG626419440

Diamond specifications and retailer prices

From HK$3,844 HKD
$490 USD
As of October 30, 2026
Save HK$15,142 HKD (80%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: HK$18,987 HKD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG626419440 or 626419440. Listed at 8 retailers as of October 30, 2026, with prices from HK$3,844 to HK$18,987, a HK$15,142 spread on the same certified stone. Brilliant Earth lists it at HK$18,987. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG626419440
Dimensions6.66 × 6.64 × 4.48 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
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
6.66 mm6.64 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG626419440
Side View
Table 60.0%Crown 36.1°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 67.5%

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: Oct 30
Current: HK$18,987 HKD|Low: HK$3,844 HKD|High: HK$39,723 HKD|Avg: HK$11,951 HKD|-18.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 6HK$3,844 HKD
Retailer 8HK$5,724 HKD
Retailer 4HK$5,727 HKD
Retailer 7HK$6,559 HKD
Retailer 2HK$12,061 HKD
Retailer 5HK$16,518 HKD
Retailer 3HK$17,104 HKD
Brilliant EarthHK$18,987 HKD

12 data points across 8 retailers

8 retailersHK$3,844 HKD to HK$18,987 HKD

A
Cheapest Retailer
-
HK$3,844 HKD
$490 USD
Final sale: no returns
A
Retailer 2
-
HK$5,724 HKD
View
A
Retailer 3
-
HK$5,727 HKD
$730 USD
View
A
Retailer 4
-
HK$6,559 HKD
$836 USD
View
B+
Retailer 5
-
HK$12,061 HKD
A$2,365 AUD
View
B+
Retailer 6
-
HK$16,518 HKD
SGD 2,845 SGD
View
Retailer 7
-
HK$17,104 HKD
$2,180 USD
View
Price last confirmed 11 days ago
Most Expensive
B+
Brilliant Earth
15233891Y · Oct 31
HK$18,987 HKD
$2,420 USD
View
7 more retailers have this diamond
Prices start from HK$3,844 HKDSave up to HK$15,142 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
1.51ct Cushion
HK$3,844 HKD