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Round|Natural|GIA

1.51ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 2245026927

Certificate GIA 2245026927

Diamond specifications and retailer prices

From $4,483 AUD
HK$24,600 HKD
As of November 1, 2026
Save $5,711 AUD (56%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $11,205 AUD at NZ Jewellers · As of September 25, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2245026927. Listed at 16 retailers as of November 1, 2026, with a 127% 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
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2245026927
Dimensions7.27 × 7.31 × 4.58 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
7.27 mm7.31 mm1.51 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2245026927
Side View
Table 58.0%Crown 35.5°Girdle: Slightly ThickPavilion 41.2°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: $7,844 AUD|Low: $4,410 AUD|High: $10,367 AUD|Avg: $6,427 AUD|-1.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 2, 2026
Retailer 12$4,483 AUD
Retailer 2$4,640 AUD
Retailer 10$4,715 AUD
Retailer 3$4,847 AUD
Retailer 8$5,152 AUD
Retailer 11$5,225 AUD
Retailer 7$5,428 AUD
Retailer 5$5,604 AUD
Retailer 9$5,668 AUD
Retailer 6$6,264 AUD
Retailer 14$6,889 AUD
Retailer 1$7,844 AUD
Retailer 4$9,307 AUD
Retailer 13$10,193 AUD

36 data points across 14 retailers

16 retailers$4,483 AUD to $10,193 AUD

A
Cheapest Retailer
-
$4,483 AUD
HK$24,600 HKD
A
Retailer 2
-
$4,640 AUD
$3,259 USD
View
A
Retailer 3
-
$4,715 AUD
$3,312 USD
View
A
Retailer 4
-
$4,847 AUD
$3,404 USD
View
B+
Retailer 5
-
$5,152 AUD
$3,619 USD
View
Final sale: no returns
A
Retailer 6
-
$5,225 AUD
View
A
Retailer 7
-
$5,428 AUD
$3,813 USD
View
Retailer 8
-
$5,604 AUD
SGD 5,320 SGD
View
Price last confirmed 13 days ago
B+
Retailer 9
-
$5,668 AUD
£3,135 GBP
View
B+
Retailer 10
-
$6,068 AUD
View
Retailer 11
-
$6,264 AUD
$4,400 USD
View
Price last confirmed 12 days ago
B+
Retailer 12
-
$6,889 AUD
€4,609 EUR
View
B
Retailer 13
-
$7,844 AUD
$5,510 USD
View
B
Retailer 14
-
$9,307 AUD
$6,538 USD
View
B
Retailer 15
-
$10,193 AUD
£5,638 GBP
View
Most Expensive
NZ Jewellers
2655f6ef-5654-4938-861c-cb17c05216c5 · Sep 25
$11,205 AUD
$7,871 USD
View
Price last confirmed 38 days ago
15 more retailers have this diamond
Prices start from $4,483 AUDSave up to $5,711 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
$4,483 AUD