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Radiant|Natural|GIA

1.51ct I SI2 Radiant Natural Diamond

ID • I/SI2 • GIA 1518170862

Certificate GIA 1518170862

Diamond specifications and retailer prices

From $5,430 AUD
As of November 7, 2026
Save $4,940 AUD (48%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $10,370 AUD at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded I 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 1518170862. Listed at 7 retailers as of November 3, 2026, with prices from $5,430 to $10,370, a $4,940 spread on the same certified stone. NZ Jewellers lists it at $10,370. 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

1.51
Carat
I
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.77°
Pavilion angle31.26°
OriginNatural
Grading LabGIA
CertificateGIA 1518170862
Dimensions7.73 × 5.92 × 3.71 mm
L/W Ratio1.31
Girdle conditionSlightly Thick
Key to symbols
Crystal, Twinning Wisp, Feather, Needle
Top View
7.73 mm5.92 mm1.51 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1518170862
Side View
Table 70.0%Crown 44.77°Girdle: MediumPavilion 31.26°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 7
Current: $10,370 AUD|Low: $5,430 AUD|High: $10,507 AUD|Avg: $7,176 AUD|-1.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 3$5,430 AUD
Retailer 4$5,804 AUD
Retailer 2$5,951 AUD
Retailer 6$5,951 AUD
Retailer 7$6,159 AUD
Retailer 9$6,261 AUD
Retailer 8$6,788 AUD
Retailer 10$7,000 AUD
Retailer 5$9,952 AUD
NZ Jewellers$10,370 AUD

35 data points across 10 retailers

7 retailers$5,430 AUD to $10,370 AUD

A
Cheapest Retailer
-
$5,430 AUD
A
Retailer 2
-
$5,804 AUD
View
A
Retailer 3
-
$5,951 AUD
View
A
Retailer 4
-
$5,951 AUD
View
A
Retailer 5
-
$6,159 AUD
View
B+
Retailer 6
-
$9,952 AUD
View
Most Expensive
B
NZ Jewellers
84c6226e-ee67-4228-a4df-b55c55477ffb · Nov 3
$10,370 AUD
$7,125 USD
View
6 more retailers have this diamond
Prices start from $5,430 AUDSave up to $4,940 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
1.51ct Radiant
$5,430 AUD