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Cushion|Lab Grown|IGI

2.59ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG737580697

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG737580697

Diamond specifications and retailer prices

From £244 GBP
$325 USD
As of October 28, 2026
Save £1,596 GBP (87%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,840 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 2.59ct lab-grown cushion diamond

This 2.59ct lab-grown cushion sits in the two to three carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG737580697 or 737580697. Listed at 13 retailers as of October 28, 2026, with prices from £244 to £1,840, a £1,596 spread on the same certified stone. Brilliant Earth lists it at £1,840. 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

2.59
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle35.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG737580697
Dimensions8.98 × 7.33 × 4.84 mm
L/W Ratio1.23
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.98 mm7.33 mm2.59 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG737580697
Side View
Table 57.0%Crown 33.8°Girdle: STK-VTKPavilion 35.2°Culet: NoneDepth 66.0%

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: £1,840 GBP|Low: £244 GBP|High: £2,170 GBP|Avg: £751 GBP|-15.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 30, 2026
Retailer 11£244 GBP
Retailer 2£339 GBP
Retailer 10£364 GBP
Retailer 14£364 GBP
Retailer 5£368 GBP
Retailer 8£438 GBP
Retailer 7£478 GBP
Retailer 12£498 GBP
Retailer 3£623 GBP
Retailer 4£905 GBP
Retailer 9£1,088 GBP
Retailer 13£1,112 GBP
Retailer 6£1,329 GBP
Brilliant Earth£1,840 GBP

40 data points across 14 retailers

13 retailers£244 GBP to £1,840 GBP

A
Cheapest Retailer
-
£244 GBP
$325 USD
Final sale: no returns
A
Retailer 2
-
£339 GBP
View
A
Retailer 3
-
£364 GBP
$485 USD
View
B+
Retailer 4
-
£364 GBP
$485 USD
View
A
Retailer 5
-
£438 GBP
€555 EUR
View
A
Retailer 6
-
£478 GBP
View
A
Retailer 7
-
£498 GBP
$663 USD
View
B+
Retailer 8
-
£623 GBP
$830 USD
View
B+
Retailer 9
-
£905 GBP
$1,205 USD
View
B+
Retailer 10
-
£1,088 GBP
View
B
Retailer 11
-
£1,112 GBP
$1,481 USD
View
Retailer 12
-
£1,329 GBP
$1,770 USD
View
Price last confirmed 29 days ago
Most Expensive
B
Brilliant Earth
18587734A · Oct 29
£1,840 GBP
$2,450 USD
View
12 more retailers have this diamond
Prices start from £244 GBPSave up to £1,596 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
2.59ct Cushion
£244 GBP