CaratHunter
Plans
Radiant|Natural|GIA

1.51ct E SI2 Radiant Natural Diamond

EX • E/SI2

Diamond specifications and retailer prices

From $11,602 NZD
$6,516 USD
As of October 25, 2026
Save $11,604 NZD (50%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $23,422 NZD at NZ Jewellers · As of September 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 19 retailers as of October 24, 2026, with a 100% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions7.67 × 5.68 × 3.79 mm
L/W Ratio1.35
Top View
7.67 mm5.68 mm1.51 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 67.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 66.7%

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: Oct 25
Current: $23,205 NZD|Low: $11,602 NZD|High: $23,422 NZD|Avg: $13,971 NZD|-0.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 3$11,602 NZD
Retailer 10$11,948 NZD
Retailer 7$12,328 NZD
Retailer 5$12,569 NZD
Retailer 4$12,763 NZD
Retailer 8$13,008 NZD
Retailer 2$13,112 NZD
Retailer 9$13,749 NZD
Retailer 6$14,502 NZD
NZ Jewellers$23,205 NZD

40 data points across 10 retailers

19 retailers$11,602 NZD to $23,205 NZD

A
Cheapest Retailer
-
$11,602 NZD
$6,516 USD
A
Retailer 2
-
$11,602 NZD
$6,516 USD
View
Retailer 3
-
$11,710 NZD
$6,577 USD
View
Price last confirmed 22 days ago
A
Retailer 4
-
$11,948 NZD
CA$9,320 CAD
View
A
Retailer 5
-
$12,328 NZD
$6,924 USD
View
A
Retailer 6
-
$12,569 NZD
$7,059 USD
View
B+
Retailer 7
-
$12,569 NZD
$7,059 USD
View
Retailer 8
-
$12,686 NZD
$7,125 USD
View
Price last confirmed 22 days ago
B+
Retailer 9
-
$12,763 NZD
$7,168 USD
View
B+
Retailer 10
-
$12,763 NZD
$7,168 USD
View
Retailer 11
-
$12,882 NZD
$7,235 USD
View
Price last confirmed 29 days ago
B+
Retailer 12
-
$13,008 NZD
$7,306 USD
View
B+
Retailer 13
-
$13,112 NZD
£5,799 GBP
View
B+
Retailer 14
-
$13,749 NZD
$7,722 USD
View
Retailer 15
-
$14,502 NZD
$8,145 USD
View
Price last confirmed 7 days ago
Retailer 16
-
$14,639 NZD
$8,222 USD
View
Price last confirmed 53 days ago
Retailer 17
-
$14,639 NZD
$8,222 USD
View
Price last confirmed 31 days ago
B
Retailer 18
-
$23,205 NZD
$13,033 USD
View
Most Expensive
NZ Jewellers
ff8c50ad-30fc-4b3c-9998-5b3eced69d03 · Sep 30
$23,422 NZD
$13,155 USD
View
Price last confirmed 30 days ago
18 more retailers have this diamond
Prices start from $11,602 NZDSave up to $11,604 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
$11,602 NZD