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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 £161 GBP
$214 USD
As of October 28, 2026
Save £716 GBP (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £877 GBP 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 £161 to £877, a £716 spread on the same certified stone. Reve Diamonds lists it at £877. 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

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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: £324 GBP|Low: £161 GBP|High: £864 GBP|Avg: £436 GBP|+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£161 GBP
Retailer 10£179 GBP
Retailer 5£240 GBP
Retailer 4£296 GBP
Retailer 1£324 GBP
Retailer 3£358 GBP
Retailer 11£430 GBP
Retailer 7£453 GBP
Retailer 8£646 GBP
Retailer 6£840 GBP
Retailer 9£841 GBP

42 data points across 11 retailers

14 retailers£161 GBP to £877 GBP

A
Cheapest Retailer
-
£161 GBP
$214 USD
Final sale: no returns
A
Retailer 2
-
£179 GBP
$238 USD
View
B+
Retailer 3
-
£240 GBP
$320 USD
View
A
Retailer 4
-
£296 GBP
€375 EUR
View
A
Retailer 5
-
£324 GBP
View
A
Retailer 6
-
£358 GBP
$477 USD
View
A
Retailer 7
-
£361 GBP
$481 USD
View
B+
Retailer 8
-
£430 GBP
$573 USD
View
B+
Retailer 9
-
£453 GBP
$603 USD
View
B+
Retailer 10
-
£615 GBP
$819 USD
View
B+
Retailer 11
-
£646 GBP
$860 USD
View
Price last confirmed 8 days ago
B
Retailer 12
-
£840 GBP
View
Price last confirmed 8 days ago
B
Retailer 13
-
£841 GBP
$1,120 USD
View
Most Expensive
B
Reve Diamonds
8AED4C9E6 · Oct 28
£877 GBP
$1,168 USD
View
13 more retailers have this diamond
Prices start from £161 GBPSave up to £716 GBP

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
£161 GBP