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Cushion|Lab Grown|IGI

3.17ct F SI1 Cushion Lab Grown Diamond

VG • F/SI1 • IGI LG557245545

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG557245545

Diamond specifications and retailer prices

From £704 GBP
As of November 6, 2026
Save £1,176 GBP (63%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,880 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 3.17ct lab-grown cushion diamond

This 3.17ct 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 LG557245545 or 557245545. Listed at 4 retailers as of November 5, 2026, with prices from £704 to £1,880, a £1,176 spread on the same certified stone. MOH London lists it at £1,880. 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

3.17
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG557245545
Dimensions8.49 × 8.10 × 5.37 mm
L/W Ratio1.05
Girdle conditionFaceted
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
8.49 mm8.10 mm3.17 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG557245545
Side View
Table 60.5%Crown 35.1°Girdle: STK-THKPavilion 35.9°Culet: NoneDepth 66.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £1,880 GBP|Low: £685 GBP|High: £1,907 GBP|Avg: £1,048 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 3£704 GBP
Retailer 2£743 GBP
Retailer 4£849 GBP
MOH London£1,880 GBP

42 data points across 4 retailers

4 retailers£704 GBP to £1,880 GBP

B+
Cheapest Retailer
-
£704 GBP
A
Retailer 2
-
£743 GBP
View
B+
Retailer 3
-
£849 GBP
View
Most Expensive
B
MOH London
LG557245545 · Nov 5
£1,880 GBP
View
3 more retailers have this diamond
Prices start from £704 GBPSave up to £1,176 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
3.17ct Cushion
£704 GBP