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Radiant|Natural|GIA

1.51ct E SI1 Radiant Natural Diamond

ID • E/SI1 • GIA 1559156534

Certificate GIA 1559156534

Diamond specifications and retailer prices

From $9,865 NZD
$5,560 USD
As of October 29, 2026
Save $7,828 NZD (44%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $17,693 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1559156534. Listed at 9 retailers as of October 29, 2026, with prices from $9,865 to $17,693, a $7,828 spread on the same certified stone. NZ Jewellers lists it at $17,693. 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
E
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle54.56°
Pavilion angle35.61°
OriginNatural
Grading LabGIA
CertificateGIA 1559156534
Dimensions7.23 × 5.70 × 4.02 mm
L/W Ratio1.27
Girdle conditionVery Thick
Key to symbols
Crystal, Cloud, Feather, Cavity, Needle, Indented Natural
Top View
7.23 mm5.70 mm1.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559156534
Side View
Table 74.0%Crown 54.56°Girdle: MED-VTKPavilion 35.61°Culet: NoneDepth 70.5%

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: Oct 29
Current: $17,693 NZD|Low: $9,494 NZD|High: $17,878 NZD|Avg: $11,729 NZD|-1.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 11$9,494 NZD
Retailer 8$9,865 NZD
Retailer 2$9,928 NZD
Retailer 10$10,220 NZD
Retailer 5$10,578 NZD
Retailer 6$10,578 NZD
Retailer 7$10,596 NZD
Retailer 9$10,765 NZD
Retailer 3$11,257 NZD
Retailer 4$15,670 NZD
NZ Jewellers$17,693 NZD

37 data points across 11 retailers

9 retailers$9,865 NZD to $17,693 NZD

A
Cheapest Retailer
-
$9,865 NZD
$5,560 USD
A
Retailer 2
-
$9,928 NZD
£4,406 GBP
View
Retailer 3
-
$10,220 NZD
$5,760 USD
View
Price last confirmed 31 days ago
A
Retailer 4
-
$10,578 NZD
$5,962 USD
View
A
Retailer 5
-
$10,578 NZD
$5,962 USD
View
Retailer 6
-
$10,596 NZD
A$9,188 AUD
View
Price last confirmed 21 days ago
A
Retailer 7
-
$10,765 NZD
$6,067 USD
View
B+
Retailer 8
-
$15,670 NZD
£6,954 GBP
View
Most Expensive
B
NZ Jewellers
4ae519c7-44c9-4346-8684-d693f49de9c5 · Oct 30
$17,693 NZD
$9,972 USD
View
8 more retailers have this diamond
Prices start from $9,865 NZDSave up to $7,828 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
$9,865 NZD