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Cushion|Lab Grown|IGI

1.57ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG618475823

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG618475823

Diamond specifications and retailer prices

From £171 GBP
$228 USD
As of October 28, 2026
Save £1,233 GBP (88%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,404 GBP at Do Amore Diamonds · As of October 27, 2026
View at Do Amore 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 LG618475823 or 618475823. Listed at 6 retailers as of October 27, 2026, with prices from £171 to £1,404, a £1,233 spread on the same certified stone. Do Amore Diamonds lists it at £1,404. 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 angle36.3°
Pavilion angle34.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG618475823
Dimensions8.56 × 5.88 × 3.93 mm
L/W Ratio1.46
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.56 mm5.88 mm1.57 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG618475823
Side View
Table 62.0%Crown 36.3°Girdle: MED-STKPavilion 34.2°Culet: NoneDepth 66.8%

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: £1,404 GBP|Low: £110 GBP|High: £1,464 GBP|Avg: £711 GBP|-4.1%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 25, 2026
Retailer 6£171 GBP
Retailer 3£317 GBP
Retailer 4£628 GBP
Retailer 2£804 GBP
Retailer 5£826 GBP
Do Amore Diamonds£1,404 GBP

15 data points across 6 retailers

6 retailers£171 GBP to £1,404 GBP

A
Cheapest Retailer
-
£171 GBP
$228 USD
Final sale: no returns
B+
Retailer 2
-
£317 GBP
$422 USD
View
B+
Retailer 3
-
£628 GBP
$836 USD
View
B
Retailer 4
-
£804 GBP
View
B
Retailer 5
-
£826 GBP
$1,100 USD
View
Most Expensive
B
Do Amore Diamonds
27-710BE60AC · Oct 27
£1,404 GBP
$1,870 USD
View
5 more retailers have this diamond
Prices start from £171 GBPSave up to £1,233 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
£171 GBP