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Cushion|Lab Grown|IGI

3.04ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG687530944

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG687530944

Diamond specifications and retailer prices

From £360 GBP
$483 USD
As of October 31, 2026
Save £2,058 GBP (85%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,418 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.04ct lab-grown cushion diamond

This 3.04ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG687530944 or 687530944. Listed at 12 retailers as of October 29, 2026, with prices from £360 to £2,418, a £2,058 spread on the same certified stone. Brilliant Earth lists it at £2,418. 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

3.04
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG687530944
Dimensions9.76 × 7.80 × 5.32 mm
L/W Ratio1.25
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.76 mm7.80 mm3.04 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG687530944
Side View
Table 60.0%Crown 32.8°Girdle: THN-MEDPavilion 39.8°Culet: NoneDepth 68.2%

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 31
Current: £2,418 GBP|Low: £353 GBP|High: £2,485 GBP|Avg: £864 GBP|-2.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 5£360 GBP
Retailer 10£391 GBP
Retailer 4£500 GBP
Retailer 11£519 GBP
Retailer 3£616 GBP
Retailer 2£639 GBP
Retailer 6£653 GBP
Retailer 9£928 GBP
Retailer 7£1,445 GBP
Retailer 8£1,478 GBP
Brilliant Earth£2,418 GBP

44 data points across 11 retailers

12 retailers£360 GBP to £2,418 GBP

A
Cheapest Retailer
-
£360 GBP
$483 USD
Final sale: no returns
A
Retailer 2
-
£391 GBP
$524 USD
View
A
Retailer 3
-
£500 GBP
$670 USD
View
B+
Retailer 4
-
£519 GBP
$695 USD
View
A
Retailer 5
-
£616 GBP
$826 USD
View
A
Retailer 6
-
£639 GBP
View
A
Retailer 7
-
£653 GBP
€833 EUR
View
A
Retailer 8
-
£756 GBP
$1,013 USD
View
B+
Retailer 9
-
£928 GBP
$1,244 USD
View
B+
Retailer 10
-
£1,445 GBP
View
B
Retailer 11
-
£1,478 GBP
$1,980 USD
View
Most Expensive
B
Brilliant Earth
20628169A · Oct 29
£2,418 GBP
$3,240 USD
View
11 more retailers have this diamond
Prices start from £360 GBPSave up to £2,058 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
3.04ct Cushion
£360 GBP