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Cushion|Lab Grown|IGI

1.57ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG502158689

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG502158689

Diamond specifications and retailer prices

From £1,697 GBP
$2,260 USD
As of October 29, 2026
1 retailer carries this diamond
Only listing: £1,697 GBP at B2C Jewels
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at B2C Jewels

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 LG502158689 or 502158689. Listed at a single retailer as of October 29, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.3°
Pavilion angle33.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG502158689
Dimensions6.84 × 6.28 mm
L/W Ratio1.09
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
6.84 mm6.28 mm1.57 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG502158689
Side View
Table 67.5%Crown 36.3°Girdle: MED-VTKPavilion 33.3°Culet: NoneDepth 66.9%

Caratlytics Score

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Average
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Price History

Last verified: Oct 29
Current: £1,697 GBP|Low: £1,616 GBP|High: £2,790 GBP|Avg: £2,061 GBP|-39.2%
September 23, 2026
B2C Jewels£1,697 GBP

4 data points across 1 retailer

1 retailer

C
B2C Jewels
20034777 · Oct 29
£1,697 GBP
$2,260 USD
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C
1.57ct Cushion
£1,697 GBP