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Marquise|Natural|GIA

3.50ct F SI2 Marquise Natural Diamond

F/SI2

Diamond specifications and retailer prices

From £42,569 GBP
CA$79,341 CAD
As of November 2, 2026
Save £8,843 GBP (17%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £51,412 GBP at The Diamond Guys · As of November 2, 2026
View at The Diamond Guys

About this 3.5ct natural marquise diamond

This 3.5ct natural marquise sits in the three to five carat band, graded F colour (colourless) and SI2 clarity (slightly-included) and certified by GIA. Listed at 2 retailers as of November 2, 2026, with prices from £42,569 to £51,412, a £8,843 spread on the same certified stone. The Diamond Guys lists it at £51,412. 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

3.50
Carat
F
Colour
SI2
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions16.42 × 8.02 × 4.57 mm
L/W Ratio2.05
Top View
16.42 mm8.02 mm3.50 ctF / SI2
OriginNatural
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA
Side View
Table 63.0%CrownGirdle: ThinPavilionCuletDepth 57.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: £42,569 GBP|Low: £42,569 GBP|High: £51,412 GBP|Avg: £48,465 GBP
Retailer 1
The Diamond Guys
September 4, 2026
Retailer 1£42,569 GBP
The Diamond Guys£51,412 GBP

2 data points across 2 retailers

2 retailers£42,569 GBP to £51,412 GBP

B
Cheapest Retailer
-
£42,569 GBP
CA$79,341 CAD
Most Expensive
C
The Diamond Guys
1842032800 · Nov 2
£51,412 GBP
$68,992 USD
View
1 more retailer has this diamond
Prices start from £42,569 GBPSave up to £8,843 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.

B
3.50ct Marquise
£42,569 GBP