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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 $9,756 NZD
$5,489 USD
As of October 31, 2026
Save $6,495 NZD (40%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $16,252 NZD 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 $9,756 to $16,252, a $6,495 spread on the same certified stone. Helzberg Diamonds lists it at $16,252. 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

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: $16,252 NZD|Low: $9,756 NZD|High: $17,083 NZD|Avg: $13,304 NZD|-4.9%
Helzberg Diamonds
Retailer 2
October 24, 2026
Retailer 2$9,756 NZD
Helzberg Diamonds$16,252 NZD

13 data points across 2 retailers

2 retailers$9,756 NZD to $16,252 NZD

A
Cheapest Retailer
-
$9,756 NZD
$5,489 USD
Most Expensive
A
Helzberg Diamonds
ZXZNPPMNKMIP · Nov 1
$16,252 NZD
$9,144 USD
View
1 more retailer has this diamond
Prices start from $9,756 NZDSave up to $6,495 NZD

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
$9,756 NZD