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Round|Natural|GIA

1.51ct N SI1 Round Natural Diamond

EX • N/SI1 • GIA 1465591279

Certificate GIA 1465591279

Diamond specifications and retailer prices

From $3,621 AUD
As of November 5, 2026
Save $4,030 AUD (53%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $7,651 AUD at NZ Jewellers · As of November 5, 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 N colour (tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1465591279. Listed at 10 retailers as of November 5, 2026, with prices from $3,621 to $7,651, a $4,030 spread on the same certified stone. NZ Jewellers lists it at $7,651. 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
N
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 1465591279
Dimensions7.32 × 7.37 × 4.55 mm
L/W Ratio1.01
Star length55%
Lower girdle75%
Cert comments
Pinpoints are not shown.
Key to symbols
Crystal
Top View
7.32 mm7.37 mm1.51 ctN / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1465591279
Side View
Table 59.0%Crown 32.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $7,651 AUD|Low: $3,621 AUD|High: $8,061 AUD|Avg: $4,878 AUD|-5.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 9$3,621 AUD
Retailer 6$3,660 AUD
Retailer 8$3,660 AUD
Retailer 7$3,828 AUD
Retailer 5$3,860 AUD
Retailer 10$4,223 AUD
Retailer 4$4,467 AUD
Retailer 2$4,535 AUD
Retailer 11$5,551 AUD
Retailer 3$6,738 AUD
NZ Jewellers$7,651 AUD

27 data points across 11 retailers

10 retailers$3,621 AUD to $7,651 AUD

B+
Cheapest Retailer
-
$3,621 AUD
B+
Retailer 2
-
$3,660 AUD
View
Retailer 3
-
$3,660 AUD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$3,828 AUD
View
B+
Retailer 5
-
$3,860 AUD
View
B+
Retailer 6
-
$4,223 AUD
View
B+
Retailer 7
-
$4,467 AUD
View
B+
Retailer 8
-
$4,535 AUD
View
B
Retailer 9
-
$5,551 AUD
View
Most Expensive
C
NZ Jewellers
56d8278c-31ff-4446-a58b-c5b81d160973 · Nov 5
$7,651 AUD
$5,356 USD
View
9 more retailers have this diamond
Prices start from $3,621 AUDSave up to $4,030 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.

B+
1.51ct Round
$3,621 AUD