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Cushion|Lab Grown|IGI

1.58ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG532249567

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG532249567

Diamond specifications and retailer prices

From £162 GBP
$216 USD
As of October 28, 2026
Save £799 GBP (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £961 GBP at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.58ct lab-grown cushion diamond

This 1.58ct 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 LG532249567 or 532249567. Listed at 13 retailers as of October 28, 2026, with prices from £162 to £961, a £799 spread on the same certified stone. Brilliant Earth lists it at £961. 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

1.58
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.5°
Pavilion angle33.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG532249567
Dimensions6.44 × 6.43 × 4.37 mm
L/W Ratio1.00
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
6.44 mm6.43 mm1.58 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG532249567
Side View
Table 62.0%Crown 37.5°Girdle: MED-THKPavilion 33.3°Culet: NoneDepth 68.0%

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: £961 GBP|Low: £162 GBP|High: £1,029 GBP|Avg: £435 GBP|-6.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 9£162 GBP
Retailer 7£179 GBP
Retailer 4£242 GBP
Retailer 3£296 GBP
Retailer 2£327 GBP
Retailer 10£360 GBP
Retailer 8£432 GBP
Retailer 6£456 GBP
Retailer 5£845 GBP
Brilliant Earth£961 GBP

44 data points across 10 retailers

13 retailers£162 GBP to £961 GBP

A
Cheapest Retailer
-
£162 GBP
$216 USD
Final sale: no returns
A
Retailer 2
-
£179 GBP
$239 USD
View
B+
Retailer 3
-
£242 GBP
$322 USD
View
A
Retailer 4
-
£296 GBP
€376 EUR
View
A
Retailer 5
-
£327 GBP
View
A
Retailer 6
-
£360 GBP
$480 USD
View
A
Retailer 7
-
£366 GBP
$487 USD
View
B+
Retailer 8
-
£432 GBP
$575 USD
View
B+
Retailer 9
-
£456 GBP
$607 USD
View
B+
Retailer 10
-
£618 GBP
$823 USD
View
B
Retailer 11
-
£845 GBP
View
Price last confirmed 8 days ago
B
Retailer 12
-
£880 GBP
$1,171 USD
View
Most Expensive
B
Brilliant Earth
10788815A · Oct 28
£961 GBP
$1,280 USD
View
12 more retailers have this diamond
Prices start from £162 GBPSave up to £799 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
1.58ct Cushion
£162 GBP