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Cushion|Natural|IGI

2.51ct F SI2 Cushion Natural Diamond

EX • F/SI2 • IGI 310

Certificate IGI 310

Diamond specifications and retailer prices

From £4,091 GBP
$5,489 USD
As of October 31, 2026
Save £2,723 GBP (40%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £6,814 GBP at Helzberg Diamonds · As of November 1, 2026
View at Helzberg Diamonds

About this 2.51ct natural cushion diamond

This 2.51ct natural cushion sits in the two to three carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI. Listed at 2 retailers as of October 31, 2026, with prices from £4,091 to £6,814, a £2,723 spread on the same certified stone. Helzberg Diamonds lists it at £6,814. 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

2.51
Carat
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabIGI
CertificateIGI 310
Dimensions8.14 × 7.24 mm
L/W Ratio1.12
Top View
8.14 mm7.24 mm2.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 310
Side View
Table 60.0%CrownGirdle: THN-THKPavilionCuletDepth 69.6%

Caratlytics Score

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

Last verified: Oct 31
Current: £6,814 GBP|Low: £4,091 GBP|High: £7,163 GBP|Avg: £5,578 GBP|-4.9%
Helzberg Diamonds
Retailer 2
October 24, 2026
Retailer 2£4,091 GBP
Helzberg Diamonds£6,814 GBP

13 data points across 2 retailers

2 retailers£4,091 GBP to £6,814 GBP

A
Cheapest Retailer
-
£4,091 GBP
$5,489 USD
Most Expensive
A
Helzberg Diamonds
ZXZNPPMNKMIP · Nov 1
£6,814 GBP
$9,144 USD
View
1 more retailer has this diamond
Prices start from £4,091 GBPSave up to £2,723 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
2.51ct Cushion
£4,091 GBP