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Round|Natural|GIA

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 5242042566

Certificate GIA 5242042566

Diamond specifications and retailer prices

From $4,792 AUD
HK$26,300 HKD
As of November 1, 2026
Save $6,592 AUD (58%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $11,385 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5242042566. Listed at 9 retailers as of October 30, 2026, with prices from $4,792 to $11,385, a $6,592 spread on the same certified stone. NZ Jewellers lists it at $11,385. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5242042566
Dimensions7.24 × 7.28 × 4.56 mm
L/W Ratio1.01
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
7.24 mm7.28 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5242042566
Side View
Table 58.0%CrownGirdle: Slightly ThickPavilion 41°Culet: NoneDepth 62.8%

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 1
Current: $11,385 AUD|Low: $4,756 AUD|High: $12,175 AUD|Avg: $7,886 AUD|-6.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 5$4,792 AUD
Retailer 9$6,097 AUD
Retailer 6$6,534 AUD
Retailer 7$6,534 AUD
Retailer 8$6,956 AUD
Retailer 4$7,353 AUD
Retailer 2$7,805 AUD
Retailer 3$10,408 AUD
NZ Jewellers$11,385 AUD

40 data points across 9 retailers

9 retailers$4,792 AUD to $11,385 AUD

A
Cheapest Retailer
-
$4,792 AUD
HK$26,300 HKD
B+
Retailer 2
-
$6,097 AUD
SGD 5,788 SGD
View
B+
Retailer 3
-
$6,534 AUD
$4,590 USD
View
B+
Retailer 4
-
$6,534 AUD
$4,590 USD
View
B+
Retailer 5
-
$6,956 AUD
$4,886 USD
View
B+
Retailer 6
-
$7,353 AUD
€4,919 EUR
View
B
Retailer 7
-
$7,805 AUD
£4,317 GBP
View
B
Retailer 8
-
$10,408 AUD
£5,757 GBP
View
Most Expensive
B
NZ Jewellers
94b0a966-6652-4bf5-97c4-71571a5704a1 · Oct 30
$11,385 AUD
$7,997 USD
View
8 more retailers have this diamond
Prices start from $4,792 AUDSave up to $6,592 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 Round
$4,792 AUD