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Cushion|Lab Grown|IGI

3.09ct F SI1 Cushion Lab Grown Diamond

VG • F/SI1 • IGI LG844614664

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG844614664

Diamond specifications and retailer prices

From £480 GBP
As of November 3, 2026
Save £964 GBP (67%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,444 GBP at MOH London · As of November 3, 2026
View at MOH London

About this 3.09ct lab-grown cushion diamond

This 3.09ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG844614664 or 844614664. Listed at 7 retailers as of November 3, 2026, with prices from £480 to £1,444, a £964 spread on the same certified stone. MOH London lists it at £1,444. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

3.09
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844614664
Dimensions9.59 × 7.77 × 5.35 mm
L/W Ratio1.23
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.59 mm7.77 mm3.09 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844614664
Side View
Table 59.0%Crown 35.3°Girdle: MED-STKPavilion 37.9°Culet: NoneDepth 68.9%

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: Nov 3
Current: £1,444 GBP|Low: £477 GBP|High: £1,444 GBP|Avg: £851 GBP|+0.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 4, 2026
Retailer 5£480 GBP
Retailer 4£501 GBP
Retailer 2£621 GBP
Retailer 3£642 GBP
Retailer 6£797 GBP
Retailer 7£1,251 GBP
MOH London£1,444 GBP

13 data points across 7 retailers

7 retailers£480 GBP to £1,444 GBP

A
Cheapest Retailer
-
£480 GBP
A
Retailer 2
-
£501 GBP
View
B+
Retailer 3
-
£621 GBP
View
A
Retailer 4
-
£642 GBP
View
B+
Retailer 5
-
£797 GBP
View
B
Retailer 6
-
£1,251 GBP
View
Most Expensive
B
MOH London
LG844614664 · Nov 3
£1,444 GBP
View
6 more retailers have this diamond
Prices start from £480 GBPSave up to £964 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
3.09ct Cushion
£480 GBP