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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 $5,489 USD
As of October 31, 2026
Save $3,655 USD (40%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $9,144 USD 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 $5,489 to $9,144, a $3,655 spread on the same certified stone. Helzberg Diamonds lists it at $9,144. 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
Color
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: $9,144 USD|Low: $5,489 USD|High: $9,612 USD|Avg: $7,485 USD|-4.9%
Helzberg Diamonds
Retailer 2
October 24, 2026
Retailer 2$5,489 USD
Helzberg Diamonds$9,144 USD

13 data points across 2 retailers

2 retailers$5,489 USD to $9,144 USD

A
Cheapest Retailer
-
$5,489 USD
Most Expensive
A
Helzberg Diamonds
ZXZNPPMNKMIP · Nov 1
$9,144 USD
View
1 more retailer has this diamond
Prices start from $5,489 USDSave up to $3,655 USD

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
$5,489 USD