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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 $7,833 AUD
$5,489 USD
As of October 31, 2026
Save $5,215 AUD (40%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $13,048 AUD 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 $7,833 to $13,048, a $5,215 spread on the same certified stone. Helzberg Diamonds lists it at $13,048. 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: $13,048 AUD|Low: $7,833 AUD|High: $13,715 AUD|Avg: $10,681 AUD|-4.9%
Helzberg Diamonds
Retailer 2
October 24, 2026
Retailer 2$7,833 AUD
Helzberg Diamonds$13,048 AUD

13 data points across 2 retailers

2 retailers$7,833 AUD to $13,048 AUD

A
Cheapest Retailer
-
$7,833 AUD
$5,489 USD
Most Expensive
A
Helzberg Diamonds
ZXZNPPMNKMIP · Nov 1
$13,048 AUD
$9,144 USD
View
1 more retailer has this diamond
Prices start from $7,833 AUDSave up to $5,215 AUD

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
$7,833 AUD