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Radiant|Natural|GIA

2.51ct H SI2 Radiant Natural Diamond

ID • H/SI2 • GIA 1435868522

Certificate GIA 1435868522

Diamond specifications and retailer prices

From $17,977 AUD
£9,943 GBP
As of October 30, 2026
Save $7,985 AUD (31%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $25,962 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 GIA 1435868522. Listed at 6 retailers as of October 30, 2026, with prices from $17,977 to $25,962, a $7,985 spread on the same certified stone. NZ Jewellers lists it at $25,962. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.23°
Pavilion angle31.23°
OriginNatural
Grading LabGIA
CertificateGIA 1435868522
Dimensions8.69 × 6.80 × 4.54 mm
L/W Ratio1.28
Girdle conditionSlightly Thick
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
8.69 mm6.80 mm2.51 ctH / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1435868522
Side View
Table 67.0%Crown 47.23°Girdle: MED-STKPavilion 31.23°Culet: NoneDepth 66.8%

Caratlytics Score

How it works →
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: Oct 30
Current: $25,962 AUD|Low: $17,917 AUD|High: $27,077 AUD|Avg: $20,510 AUD|-4.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 2$17,977 AUD
Retailer 8$18,340 AUD
Retailer 3$18,386 AUD
Retailer 7$18,541 AUD
Retailer 9$18,598 AUD
Retailer 6$18,628 AUD
Retailer 11$18,692 AUD
Retailer 12$19,483 AUD
Retailer 4$20,181 AUD
Retailer 10$24,146 AUD
Retailer 5$24,458 AUD
NZ Jewellers$25,962 AUD

29 data points across 12 retailers

6 retailers$17,977 AUD to $25,962 AUD

A
Cheapest Retailer
-
$17,977 AUD
£9,943 GBP
A
Retailer 2
-
$18,340 AUD
$12,883 USD
View
A
Retailer 3
-
$18,541 AUD
$13,024 USD
View
A
Retailer 4
-
$18,628 AUD
$13,085 USD
View
A
Retailer 5
-
$24,458 AUD
£13,528 GBP
View
Most Expensive
A
NZ Jewellers
1b3611f2-f6e1-4370-a6bf-9ffa9a53cd55 · Oct 30
$25,962 AUD
$18,237 USD
View
5 more retailers have this diamond
Prices start from $17,977 AUDSave up to $7,985 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
$17,977 AUD