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Cushion|Lab Grown|IGI

1.51ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG519231898

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG519231898

Diamond specifications and retailer prices

From HK$1,622 HKD
As of November 6, 2026
Save HK$7,374 HKD (82%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$8,997 HKD at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG519231898 or 519231898. Listed at 13 retailers as of November 6, 2026, with prices from HK$1,622 to HK$8,997, a HK$7,374 spread on the same certified stone. Reve Diamonds lists it at HK$8,997. 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

1.51
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle33.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG519231898
Dimensions6.71 × 6.64 × 4.00 mm
L/W Ratio1.01
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
6.71 mm6.64 mm1.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG519231898
Side View
Table 62.5%Crown 33°Girdle: MED-THKPavilion 33.6°Culet: NoneDepth 60.2%

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$3,213 HKD|Low: HK$1,622 HKD|High: HK$8,700 HKD|Avg: HK$4,094 HKD|+3.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 10HK$1,622 HKD
Retailer 8HK$1,803 HKD
Retailer 7HK$2,430 HKD
Retailer 4HK$2,970 HKD
Retailer 1HK$3,213 HKD
Retailer 2HK$3,590 HKD
Retailer 5HK$4,295 HKD
Retailer 9HK$4,420 HKD
Retailer 6HK$7,132 HKD
Retailer 3HK$8,433 HKD

42 data points across 10 retailers

13 retailersHK$1,622 HKD to HK$8,997 HKD

A
Cheapest Retailer
-
HK$1,622 HKD
Final sale: no returns
Retailer 2
-
HK$1,803 HKD
View
Price last confirmed 12 days ago
B+
Retailer 3
-
HK$2,430 HKD
View
A
Retailer 4
-
HK$2,970 HKD
View
A
Retailer 5
-
HK$3,213 HKD
View
A
Retailer 6
-
HK$3,519 HKD
View
A
Retailer 7
-
HK$3,590 HKD
View
A
Retailer 8
-
HK$4,295 HKD
View
B+
Retailer 9
-
HK$4,420 HKD
View
B+
Retailer 10
-
HK$6,223 HKD
View
B+
Retailer 11
-
HK$7,132 HKD
View
B
Retailer 12
-
HK$8,433 HKD
View
Most Expensive
B
Reve Diamonds
51A9E8EA3 · Nov 6
HK$8,997 HKD
$1,148 USD
View
12 more retailers have this diamond
Prices start from HK$1,622 HKDSave up to HK$7,374 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$1,622 HKD