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Radiant|Natural|HRD

2.51ct H SI2 Radiant Natural Diamond

EX • H/SI2 • HRD 250000296370

Certificate HRD 250000296370

Diamond specifications and retailer prices

From $11,857 AUD
$8,329 USD
As of November 1, 2026
Save $7,974 AUD (40%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $19,831 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 2.51ct natural radiant diamond

This 2.51ct natural radiant sits in the two to three carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by HRD 250000296370. Listed at 4 retailers as of October 30, 2026, with prices from $11,857 to $19,831, a $7,974 spread on the same certified stone. NZ Jewellers lists it at $19,831. 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
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.05°
Pavilion angle30.89°
OriginNatural
Grading LabHRD
CertificateHRD 250000296370
Dimensions8.99 × 6.78 × 4.46 mm
L/W Ratio1.33
Girdle conditionMedium
Top View
8.99 mm6.78 mm2.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateHRD 250000296370
Side View
Table 70.0%Crown 44.05°GirdlePavilion 30.89°Culet: NoneDepth 65.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $19,831 AUD|Low: $11,681 AUD|High: $19,899 AUD|Avg: $14,265 AUD|-0.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 5$11,681 AUD
Retailer 4$11,857 AUD
Retailer 3$12,039 AUD
Retailer 6$12,629 AUD
Retailer 2$16,525 AUD
NZ Jewellers$19,831 AUD

21 data points across 6 retailers

4 retailers$11,857 AUD to $19,831 AUD

A
Cheapest Retailer
-
$11,857 AUD
$8,329 USD
A
Retailer 2
-
$12,039 AUD
$8,457 USD
View
A
Retailer 3
-
$16,525 AUD
£9,140 GBP
View
Most Expensive
A
NZ Jewellers
08a9342f-3621-4946-8beb-74fc9ef5e466 · Oct 30
$19,831 AUD
$13,930 USD
View
3 more retailers have this diamond
Prices start from $11,857 AUDSave up to $7,974 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 Radiant
$11,857 AUD