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Cushion|Lab Grown|IGI

3.06ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG602313365

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG602313365

Diamond specifications and retailer prices

From £306 GBP
As of November 6, 2026
Save £1,615 GBP (84%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,920 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 3.06ct lab-grown cushion diamond

This 3.06ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG602313365 or 602313365. Listed at 12 retailers as of November 6, 2026, with prices from £306 to £1,920, a £1,615 spread on the same certified stone. Brilliant Earth lists it at £1,920. 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

3.06
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle33.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG602313365
Dimensions8.37 × 7.84 × 5.29 mm
L/W Ratio1.07
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.37 mm7.84 mm3.06 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG602313365
Side View
Table 61.0%Crown 34.7°Girdle: MED-THKPavilion 33.5°Culet: NoneDepth 67.5%

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: Nov 6
Current: £1,920 GBP|Low: £306 GBP|High: £2,234 GBP|Avg: £850 GBP|-13.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11£306 GBP
Retailer 8£338 GBP
Retailer 7£534 GBP
Retailer 10£541 GBP
Retailer 2£563 GBP
Retailer 3£574 GBP
Retailer 4£604 GBP
Retailer 6£882 GBP
Retailer 5£1,319 GBP
Retailer 9£1,479 GBP
Brilliant Earth£1,920 GBP

44 data points across 11 retailers

12 retailers£306 GBP to £1,920 GBP

A
Cheapest Retailer
-
£306 GBP
Final sale: no returns
Retailer 2
-
£338 GBP
View
Price last confirmed 12 days ago
A
Retailer 3
-
£534 GBP
View
B+
Retailer 4
-
£541 GBP
View
A
Retailer 5
-
£563 GBP
View
Retailer 6
-
£574 GBP
View
Price last confirmed 8 days ago
A
Retailer 7
-
£604 GBP
View
A
Retailer 8
-
£769 GBP
View
B+
Retailer 9
-
£882 GBP
View
B+
Retailer 10
-
£1,319 GBP
View
Retailer 11
-
£1,479 GBP
View
Price last confirmed 32 days ago
Most Expensive
B
Brilliant Earth
8559581A · Nov 6
£1,920 GBP
$2,570 USD
View
11 more retailers have this diamond
Prices start from £306 GBPSave up to £1,615 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
3.06ct Cushion
£306 GBP