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Cushion|Lab Grown|IGI

1.57ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG526288477

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG526288477

Diamond specifications and retailer prices

From $305 AUD
$214 USD
As of October 28, 2026
Save $1,358 AUD (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,662 AUD at Reve Diamonds · As of October 28, 2026
View at Reve Diamonds

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 LG526288477 or 526288477. Listed at 14 retailers as of October 28, 2026, with prices from $305 to $1,662, a $1,358 spread on the same certified stone. Reve Diamonds lists it at $1,662. 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 angle36.5°
Pavilion angle31.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG526288477
Dimensions6.82 × 6.39 × 4.03 mm
L/W Ratio1.07
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
6.82 mm6.39 mm1.57 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG526288477
Side View
Table 67.0%Crown 36.5°Girdle: STK-THKPavilion 31.1°Culet: NoneDepth 63.1%

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: Oct 28
Current: $615 AUD|Low: $305 AUD|High: $1,637 AUD|Avg: $827 AUD|+4.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 2$305 AUD
Retailer 10$339 AUD
Retailer 5$455 AUD
Retailer 4$560 AUD
Retailer 1$615 AUD
Retailer 3$678 AUD
Retailer 11$816 AUD
Retailer 7$858 AUD
Retailer 8$1,224 AUD
Retailer 6$1,593 AUD
Retailer 9$1,594 AUD

42 data points across 11 retailers

14 retailers$305 AUD to $1,662 AUD

A
Cheapest Retailer
-
$305 AUD
$214 USD
Final sale: no returns
A
Retailer 2
-
$339 AUD
$238 USD
View
B+
Retailer 3
-
$455 AUD
$320 USD
View
A
Retailer 4
-
$560 AUD
€375 EUR
View
A
Retailer 5
-
$615 AUD
£340 GBP
View
A
Retailer 6
-
$678 AUD
$477 USD
View
A
Retailer 7
-
$685 AUD
$481 USD
View
B+
Retailer 8
-
$816 AUD
$573 USD
View
B+
Retailer 9
-
$858 AUD
$603 USD
View
B+
Retailer 10
-
$1,166 AUD
$819 USD
View
B+
Retailer 11
-
$1,224 AUD
$860 USD
View
Price last confirmed 8 days ago
B
Retailer 12
-
$1,593 AUD
£881 GBP
View
Price last confirmed 8 days ago
B
Retailer 13
-
$1,594 AUD
$1,120 USD
View
Most Expensive
B
Reve Diamonds
8AED4C9E6 · Oct 28
$1,662 AUD
$1,168 USD
View
13 more retailers have this diamond
Prices start from $305 AUDSave up to $1,358 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
$305 AUD