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Cushion|Lab Grown|IGI

1.57ct I SI1 Cushion Lab Grown Diamond

ID • I/SI1 • IGI LG587320952

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG587320952

Diamond specifications and retailer prices

From £240 GBP
$322 USD
As of November 1, 2026
Save £760 GBP (76%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,000 GBP at Do Amore Diamonds · As of October 31, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG587320952 or 587320952. Listed at 5 retailers as of October 31, 2026, with prices from £240 to £1,000, a £760 spread on the same certified stone. Do Amore Diamonds lists it at £1,000. 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
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG587320952
Dimensions6.79 × 6.73 × 4.56 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
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
6.79 mm6.73 mm1.57 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG587320952
Side View
Table 60.0%Crown 36.2°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 67.8%

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: Nov 1
Current: £1,000 GBP|Low: £237 GBP|High: £1,134 GBP|Avg: £702 GBP|-6.9%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 30, 2026
Retailer 4£240 GBP
Retailer 5£496 GBP
Retailer 2£642 GBP
Retailer 3£665 GBP
Do Amore Diamonds£1,000 GBP

9 data points across 5 retailers

5 retailers£240 GBP to £1,000 GBP

B+
Cheapest Retailer
-
£240 GBP
$322 USD
A
Retailer 2
-
£496 GBP
$664 USD
View
B+
Retailer 3
-
£642 GBP
$860 USD
View
B+
Retailer 4
-
£665 GBP
View
Most Expensive
B
Do Amore Diamonds
27-1E583C975 · Oct 31
£1,000 GBP
$1,340 USD
View
4 more retailers have this diamond
Prices start from £240 GBPSave up to £760 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
£240 GBP