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Cushion|Lab Grown|IGI

3.03ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG770681595

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG770681595

Diamond specifications and retailer prices

From £290 GBP
$388 USD
As of October 31, 2026
Save £965 GBP (77%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,474 GBP at Rare Carat · As of October 19, 2026
View at Rare Carat

About this 3.03ct lab-grown cushion diamond

This 3.03ct 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 LG770681595 or 770681595. Listed at 13 retailers as of October 25, 2026, with a 333% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

3.03
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.5°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770681595
Dimensions11.00 × 7.25 × 4.70 mm
L/W Ratio1.52
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.00 mm7.25 mm3.03 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770681595
Side View
Table 61.0%Crown 40.5°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 64.8%

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: Oct 31
Current: £1,474 GBP|Low: £206 GBP|High: £2,075 GBP|Avg: £830 GBP|-3.3%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 3£290 GBP
Retailer 11£321 GBP
Retailer 9£485 GBP
Retailer 2£511 GBP
Retailer 10£516 GBP
Retailer 6£576 GBP
Retailer 13£613 GBP
Retailer 5£732 GBP
Retailer 8£797 GBP
Retailer 12£1,028 GBP
Retailer 7£1,255 GBP
Rare Carat£1,474 GBP
Retailer 4£2,075 GBP

40 data points across 13 retailers

13 retailers£290 GBP to £1,255 GBP

A
Cheapest Retailer
-
£290 GBP
$388 USD
Final sale: no returns
Retailer 2
-
£321 GBP
$430 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
£485 GBP
$650 USD
View
A
Retailer 4
-
£511 GBP
€652 EUR
View
B+
Retailer 5
-
£516 GBP
$691 USD
View
A
Retailer 6
-
£576 GBP
View
A
Retailer 7
-
£613 GBP
$821 USD
View
A
Retailer 8
-
£732 GBP
$981 USD
View
B+
Retailer 9
-
£797 GBP
$1,068 USD
View
B+
Retailer 10
-
£1,028 GBP
SGD 1,862 SGD
View
B+
Retailer 11
-
£1,063 GBP
$1,424 USD
View
B+
Retailer 12
-
£1,255 GBP
View
Most Expensive
Rare Carat
30R770681595 · Oct 19
£1,474 GBP
$1,975 USD
View
Price last confirmed 13 days ago
12 more retailers have this diamond
Prices start from £290 GBPSave up to £965 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
3.03ct Cushion
£290 GBP