CaratHunter
Plans
Cushion|Lab Grown|IGI

1.51ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG537240878

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG537240878

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)
16 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 LG537240878 or 537240878. Listed at 16 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle31.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG537240878
Dimensions7.72 × 5.99 × 3.75 mm
L/W Ratio1.29
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
7.72 mm5.99 mm1.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG537240878
Side View
Table 60.5%Crown 37.4°Girdle: MED-STKPavilion 31.3°Culet: NoneDepth 62.6%

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$4,146 HKD|Low: HK$1,622 HKD|High: HK$8,535 HKD|Avg: HK$4,066 HKD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 7, 2026
Retailer 4HK$1,622 HKD
Retailer 2HK$1,803 HKD
Retailer 13HK$2,430 HKD
Retailer 9HK$2,970 HKD
Retailer 8HK$3,221 HKD
Retailer 5HK$3,590 HKD
Retailer 11HK$3,958 HKD
Retailer 1HK$4,146 HKD
Retailer 10HK$4,295 HKD
Retailer 3HK$4,420 HKD
Retailer 6HK$6,662 HKD
Retailer 12HK$7,132 HKD
Retailer 7HK$8,386 HKD

44 data points across 13 retailers

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

A
Cheapest Retailer
-
HK$1,622 HKD
Final sale: no returns
A
Retailer 2
-
HK$1,803 HKD
View
B+
Retailer 3
-
HK$2,430 HKD
View
A
Retailer 4
-
HK$2,970 HKD
View
A
Retailer 5
-
HK$3,221 HKD
View
A
Retailer 6
-
HK$3,519 HKD
View
A
Retailer 7
-
HK$3,590 HKD
View
A
Retailer 8
-
HK$3,958 HKD
View
A
Retailer 9
-
HK$4,146 HKD
View
A
Retailer 10
-
HK$4,295 HKD
View
B+
Retailer 11
-
HK$4,420 HKD
View
B
Retailer 12
-
HK$6,223 HKD
View
B+
Retailer 13
-
HK$6,662 HKD
View
B
Retailer 14
-
HK$7,132 HKD
View
B
Retailer 15
-
HK$8,386 HKD
View
Most Expensive
B
Reve Diamonds
DD937C927 · Nov 6
HK$8,997 HKD
$1,148 USD
View
15 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