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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 $6,730 NZD
As of November 7, 2026
Save $6,122 NZD (48%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $12,853 NZD 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 $6,730 to $12,853, a $6,122 spread on the same certified stone. NZ Jewellers lists it at $12,853. 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: $12,853 NZD|Low: $6,730 NZD|High: $13,022 NZD|Avg: $8,895 NZD|-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$6,730 NZD
Retailer 4$7,194 NZD
Retailer 2$7,376 NZD
Retailer 6$7,376 NZD
Retailer 7$7,634 NZD
Retailer 9$7,760 NZD
Retailer 8$8,413 NZD
Retailer 10$8,677 NZD
Retailer 5$12,335 NZD
NZ Jewellers$12,853 NZD

35 data points across 10 retailers

7 retailers$6,730 NZD to $12,853 NZD

A
Cheapest Retailer
-
$6,730 NZD
A
Retailer 2
-
$7,194 NZD
View
A
Retailer 3
-
$7,376 NZD
View
A
Retailer 4
-
$7,376 NZD
View
A
Retailer 5
-
$7,634 NZD
View
B+
Retailer 6
-
$12,335 NZD
View
Most Expensive
B
NZ Jewellers
84c6226e-ee67-4228-a4df-b55c55477ffb · Nov 3
$12,853 NZD
$7,125 USD
View
6 more retailers have this diamond
Prices start from $6,730 NZDSave up to $6,122 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
$6,730 NZD