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Cushion|Lab Grown|IGI

1.51ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG726545903

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG726545903

Diamond specifications and retailer prices

From HK$2,038 HKD
As of November 6, 2026
Save HK$11,207 HKD (85%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: HK$13,245 HKD at Brilliant Earth · As of November 6, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG726545903 or 726545903. Listed at 12 retailers as of November 6, 2026, with prices from HK$2,038 to HK$13,245, a HK$11,207 spread on the same certified stone. Brilliant Earth lists it at HK$13,245. 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 angle28.9°
Pavilion angle30.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG726545903
Dimensions8.56 × 5.76 × 3.49 mm
L/W Ratio1.49
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.56 mm5.76 mm1.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG726545903
Side View
Table 60.0%Crown 28.9°Girdle: MED-THKPavilion 30.9°Culet: LargeDepth 60.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: HK$13,245 HKD|Low: HK$2,038 HKD|High: HK$13,245 HKD|Avg: HK$4,921 HKD|+49.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 10HK$2,038 HKD
Retailer 8HK$2,265 HKD
Retailer 6HK$3,057 HKD
Retailer 5HK$3,754 HKD
Retailer 4HK$4,232 HKD
Retailer 9HK$4,828 HKD
Retailer 7HK$6,975 HKD
Retailer 2HK$8,174 HKD
Retailer 3HK$9,021 HKD
Brilliant EarthHK$13,245 HKD

43 data points across 10 retailers

12 retailersHK$2,038 HKD to HK$13,245 HKD

A
Cheapest Retailer
-
HK$2,038 HKD
Final sale: no returns
A
Retailer 2
-
HK$2,265 HKD
View
B+
Retailer 3
-
HK$3,057 HKD
View
A
Retailer 4
-
HK$3,652 HKD
View
A
Retailer 5
-
HK$3,754 HKD
View
A
Retailer 6
-
HK$4,232 HKD
View
B+
Retailer 7
-
HK$4,828 HKD
View
Retailer 8
-
HK$6,975 HKD
View
Price last confirmed 17 days ago
B
Retailer 9
-
HK$7,688 HKD
View
B
Retailer 10
-
HK$8,174 HKD
View
B
Retailer 11
-
HK$9,021 HKD
View
Most Expensive
B
Brilliant Earth
20664776A · Nov 6
HK$13,245 HKD
$1,690 USD
View
11 more retailers have this diamond
Prices start from HK$2,038 HKDSave up to HK$11,207 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$2,038 HKD