CaratHunter
Plans
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 $313 AUD
$220 USD
As of October 28, 2026
Save $1,836 AUD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,149 AUD at Brilliant Earth · As of October 29, 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 $313 to $2,149, a $1,836 spread on the same certified stone. Brilliant Earth lists it at $2,149. 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: $2,149 AUD|Low: $290 AUD|High: $2,149 AUD|Avg: $851 AUD|+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 13$313 AUD
Retailer 11$346 AUD
Retailer 8$446 AUD
Retailer 9$467 AUD
Retailer 6$583 AUD
Retailer 2$633 AUD
Retailer 12$688 AUD
Retailer 10$716 AUD
Retailer 3$1,190 AUD
Retailer 5$1,260 AUD
Retailer 7$1,622 AUD
Retailer 4$1,682 AUD
Brilliant Earth$2,149 AUD

39 data points across 13 retailers

13 retailers$313 AUD to $2,149 AUD

A
Cheapest Retailer
-
$313 AUD
$220 USD
Final sale: no returns
A
Retailer 2
-
$346 AUD
$243 USD
View
Price last confirmed 13 days ago
A
Retailer 3
-
$446 AUD
£247 GBP
View
Price last confirmed 12 days ago
B+
Retailer 4
-
$467 AUD
$328 USD
View
A
Retailer 5
-
$583 AUD
€390 EUR
View
A
Retailer 6
-
$633 AUD
£350 GBP
View
A
Retailer 7
-
$688 AUD
$483 USD
View
A
Retailer 8
-
$716 AUD
$503 USD
View
B+
Retailer 9
-
$1,190 AUD
$836 USD
View
B+
Retailer 10
-
$1,260 AUD
$885 USD
View
Price last confirmed 29 days ago
B
Retailer 11
-
$1,622 AUD
£897 GBP
View
B
Retailer 12
-
$1,682 AUD
$1,182 USD
View
Most Expensive
B
Brilliant Earth
21679088A · Oct 29
$2,149 AUD
$1,510 USD
View
12 more retailers have this diamond
Prices start from $313 AUDSave up to $1,836 AUD

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
$313 AUD