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Radiant|Natural|GIA

1.51ct E SI2 Radiant Natural Diamond

EX • E/SI2

Diamond specifications and retailer prices

From $9,275 AUD
$6,516 USD
As of October 25, 2026
Save $9,276 AUD (50%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $18,725 AUD 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: $18,551 AUD|Low: $9,275 AUD|High: $18,725 AUD|Avg: $11,171 AUD|-0.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 2$9,275 AUD
Retailer 10$9,551 AUD
Retailer 7$9,856 AUD
Retailer 4$10,048 AUD
Retailer 3$10,203 AUD
Retailer 8$10,399 AUD
Retailer 5$10,512 AUD
Retailer 9$10,991 AUD
Retailer 6$11,594 AUD
NZ Jewellers$18,551 AUD

39 data points across 10 retailers

19 retailers$9,275 AUD to $18,551 AUD

A
Cheapest Retailer
-
$9,275 AUD
$6,516 USD
A
Retailer 2
-
$9,275 AUD
$6,516 USD
View
Retailer 3
-
$9,362 AUD
$6,577 USD
View
Price last confirmed 22 days ago
A
Retailer 4
-
$9,551 AUD
CA$9,320 CAD
View
A
Retailer 5
-
$9,856 AUD
$6,924 USD
View
A
Retailer 6
-
$10,048 AUD
$7,059 USD
View
B+
Retailer 7
-
$10,048 AUD
$7,059 USD
View
Retailer 8
-
$10,142 AUD
$7,125 USD
View
Price last confirmed 22 days ago
B+
Retailer 9
-
$10,203 AUD
$7,168 USD
View
B+
Retailer 10
-
$10,203 AUD
$7,168 USD
View
Retailer 11
-
$10,298 AUD
$7,235 USD
View
Price last confirmed 29 days ago
B+
Retailer 12
-
$10,399 AUD
$7,306 USD
View
B+
Retailer 13
-
$10,512 AUD
£5,815 GBP
View
B+
Retailer 14
-
$10,991 AUD
$7,722 USD
View
B+
Retailer 15
-
$11,594 AUD
$8,145 USD
View
Retailer 16
-
$11,703 AUD
$8,222 USD
View
Price last confirmed 53 days ago
Retailer 17
-
$11,703 AUD
$8,222 USD
View
Price last confirmed 31 days ago
B
Retailer 18
-
$18,551 AUD
$13,033 USD
View
Most Expensive
NZ Jewellers
ff8c50ad-30fc-4b3c-9998-5b3eced69d03 · Sep 30
$18,725 AUD
$13,155 USD
View
Price last confirmed 29 days ago
18 more retailers have this diamond
Prices start from $9,275 AUDSave up to $9,276 AUD

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
$9,275 AUD