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Radiant|Natural|GIA

1.51ct J SI2 Radiant Natural Diamond

ID • J/SI2 • GIA 1509049420

Certificate GIA 1509049420

Diamond specifications and retailer prices

From $4,199 NZD
£1,864 GBP
As of November 2, 2026
Save $5,128 NZD (55%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $9,327 NZD at NZ Jewellers · As of October 30, 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 J 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 1509049420. Listed at 7 retailers as of October 30, 2026, with prices from $4,199 to $9,327, a $5,128 spread on the same certified stone. NZ Jewellers lists it at $9,327. 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
J
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.94°
Pavilion angle30.54°
OriginNatural
Grading LabGIA
CertificateGIA 1509049420
Dimensions7.29 × 5.66 × 3.86 mm
L/W Ratio1.29
Girdle conditionVery Thick
Key to symbols
Crystal, Cloud, Needle
Top View
7.29 mm5.66 mm1.51 ctJ / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1509049420
Side View
Table 68.0%Crown 46.94°Girdle: ThickPavilion 30.54°Culet: NoneDepth 68.2%

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 2
Current: $9,327 NZD|Low: $4,069 NZD|High: $9,608 NZD|Avg: $5,851 NZD|-2.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 2$4,199 NZD
Retailer 3$4,411 NZD
Retailer 6$4,461 NZD
Retailer 5$4,666 NZD
Retailer 7$4,718 NZD
Retailer 4$7,817 NZD
NZ Jewellers$9,327 NZD

41 data points across 7 retailers

7 retailers$4,199 NZD to $9,327 NZD

A
Cheapest Retailer
-
$4,199 NZD
£1,864 GBP
A
Retailer 2
-
$4,411 NZD
£1,957 GBP
View
A
Retailer 3
-
$4,461 NZD
$2,514 USD
View
A
Retailer 4
-
$4,666 NZD
$2,630 USD
View
A
Retailer 5
-
$4,718 NZD
$2,659 USD
View
B+
Retailer 6
-
$7,817 NZD
£3,469 GBP
View
Most Expensive
B
NZ Jewellers
2e6e491d-5770-4b9f-a3a8-e7cd0dc121c4 · Oct 30
$9,327 NZD
$5,257 USD
View
6 more retailers have this diamond
Prices start from $4,199 NZDSave up to $5,128 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
1.51ct Radiant
$4,199 NZD