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Radiant|Natural|GIA

1.51ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 1528795927

Certificate GIA 1528795927

Diamond specifications and retailer prices

From $6,804 NZD
£3,014 GBP
As of November 2, 2026
Save $5,688 NZD (46%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $12,493 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1528795927. Listed at 8 retailers as of October 30, 2026, with prices from $6,804 to $12,493, a $5,688 spread on the same certified stone. NZ Jewellers lists it at $12,493. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle48.67°
Pavilion angle31.5°
OriginNatural
Grading LabGIA
CertificateGIA 1528795927
Dimensions7.05 × 5.64 × 3.99 mm
L/W Ratio1.25
Top View
7.05 mm5.64 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1528795927
Side View
Table 65.0%Crown 48.67°Girdle: STK-THKPavilion 31.5°Culet: NoneDepth 70.6%

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: $12,493 NZD|Low: $6,517 NZD|High: $12,496 NZD|Avg: $8,276 NZD|-0.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 10$6,517 NZD
Retailer 2$6,804 NZD
Retailer 8$6,834 NZD
Retailer 5$7,171 NZD
Retailer 7$7,171 NZD
Retailer 6$7,426 NZD
Retailer 9$7,691 NZD
Retailer 3$7,737 NZD
Retailer 11$7,761 NZD
Retailer 4$11,992 NZD
NZ Jewellers$12,493 NZD

35 data points across 11 retailers

8 retailers$6,804 NZD to $12,493 NZD

A
Cheapest Retailer
-
$6,804 NZD
£3,014 GBP
A
Retailer 2
-
$6,834 NZD
$3,845 USD
View
A
Retailer 3
-
$7,171 NZD
$4,035 USD
View
A
Retailer 4
-
$7,171 NZD
$4,035 USD
View
A
Retailer 5
-
$7,426 NZD
$4,178 USD
View
Retailer 6
-
$7,691 NZD
A$6,658 AUD
View
Price last confirmed 29 days ago
B+
Retailer 7
-
$11,992 NZD
£5,313 GBP
View
Most Expensive
B
NZ Jewellers
4b7c664d-ceb4-4377-accf-6acf1e770705 · Oct 30
$12,493 NZD
$7,029 USD
View
7 more retailers have this diamond
Prices start from $6,804 NZDSave up to $5,688 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
$6,804 NZD