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Cushion|Lab Grown|IGI

1.57ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG831623571

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG831623571

Diamond specifications and retailer prices

From HK$1,726 HKD
$220 USD
As of October 28, 2026
Save HK$10,120 HKD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$11,846 HKD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.57ct lab-grown cushion diamond

This 1.57ct 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 LG831623571 or 831623571. Listed at 13 retailers as of October 28, 2026, with prices from HK$1,726 to HK$11,846, a HK$10,120 spread on the same certified stone. Brilliant Earth lists it at HK$11,846. 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

1.57
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831623571
Dimensions7.65 × 6.13 × 4.09 mm
L/W Ratio1.25
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.65 mm6.13 mm1.57 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831623571
Side View
Table 64.0%Crown 33.1°Girdle: STK-VTKPavilion 40.7°Culet: NoneDepth 66.7%

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 28
Current: HK$11,846 HKD|Low: HK$1,600 HKD|High: HK$11,846 HKD|Avg: HK$4,886 HKD|+6.3%
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
October 29, 2026
Retailer 13HK$1,726 HKD
Retailer 11HK$1,906 HKD
Retailer 8HK$2,457 HKD
Retailer 9HK$2,573 HKD
Retailer 2HK$3,213 HKD
Retailer 6HK$3,479 HKD
Retailer 12HK$3,789 HKD
Retailer 10HK$3,946 HKD
Retailer 3HK$6,560 HKD
Retailer 5HK$6,943 HKD
Retailer 7HK$8,937 HKD
Retailer 4HK$9,272 HKD
Brilliant EarthHK$11,846 HKD

39 data points across 13 retailers

13 retailersHK$1,726 HKD to HK$11,846 HKD

A
Cheapest Retailer
-
HK$1,726 HKD
$220 USD
Final sale: no returns
A
Retailer 2
-
HK$1,906 HKD
$243 USD
View
Price last confirmed 13 days ago
A
Retailer 3
-
HK$2,457 HKD
£247 GBP
View
Price last confirmed 12 days ago
B+
Retailer 4
-
HK$2,573 HKD
$328 USD
View
A
Retailer 5
-
HK$3,213 HKD
€390 EUR
View
A
Retailer 6
-
HK$3,479 HKD
£349 GBP
View
A
Retailer 7
-
HK$3,789 HKD
$483 USD
View
A
Retailer 8
-
HK$3,946 HKD
$503 USD
View
B+
Retailer 9
-
HK$6,560 HKD
$836 USD
View
B+
Retailer 10
-
HK$6,943 HKD
$885 USD
View
Price last confirmed 29 days ago
B
Retailer 11
-
HK$8,937 HKD
£897 GBP
View
B
Retailer 12
-
HK$9,272 HKD
$1,182 USD
View
Most Expensive
B
Brilliant Earth
21679088A · Oct 28
HK$11,846 HKD
$1,510 USD
View
12 more retailers have this diamond
Prices start from HK$1,726 HKDSave up to HK$10,120 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
1.57ct Cushion
HK$1,726 HKD