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Cushion|Lab Grown|IGI

3.05ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG671479495

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG671479495

Diamond specifications and retailer prices

From £470 GBP
$630 USD
As of October 31, 2026
Save £3,261 GBP (87%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,732 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 3.05ct lab-grown cushion diamond

This 3.05ct 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 LG671479495 or 671479495. Listed at 8 retailers as of October 31, 2026, with prices from £470 to £3,732, a £3,261 spread on the same certified stone. Do Amore Diamonds lists it at £3,732. 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

3.05
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG671479495
Dimensions8.64 × 8.42 × 5.48 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.64 mm8.42 mm3.05 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG671479495
Side View
Table 66.0%Crown 33.7°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 65.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £902 GBP|Low: £335 GBP|High: £1,552 GBP|Avg: £886 GBP|+2.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 6£470 GBP
Retailer 7£648 GBP
Retailer 2£649 GBP
Retailer 8£694 GBP
Retailer 4£784 GBP
Retailer 1£902 GBP
Retailer 5£1,468 GBP
Retailer 3£1,470 GBP

11 data points across 8 retailers

8 retailers£470 GBP to £3,732 GBP

A
Cheapest Retailer
-
£470 GBP
$630 USD
Final sale: no returns
A
Retailer 2
-
£648 GBP
$868 USD
View
A
Retailer 3
-
£649 GBP
$870 USD
View
A
Retailer 4
-
£784 GBP
$1,050 USD
View
B+
Retailer 5
-
£902 GBP
View
B+
Retailer 6
-
£1,468 GBP
$1,967 USD
View
B
Retailer 7
-
£1,470 GBP
$1,970 USD
View
Most Expensive
B
Do Amore Diamonds
27-27E6388C2 · Oct 31
£3,732 GBP
$5,000 USD
View
7 more retailers have this diamond
Prices start from £470 GBPSave up to £3,261 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
3.05ct Cushion
£470 GBP