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Round|Natural|GIA

1.51ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 2428630036

Certificate GIA 2428630036

Diamond specifications and retailer prices

From $4,657 AUD
As of November 5, 2026
Save $5,627 AUD (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $10,284 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 M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2428630036. Listed at 11 retailers as of November 5, 2026, with prices from $4,657 to $10,284, a $5,627 spread on the same certified stone. NZ Jewellers lists it at $10,284. 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
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2428630036
Dimensions7.29 × 7.32 × 4.58 mm
L/W Ratio1.00
Top View
7.29 mm7.32 mm1.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2428630036
Side View
Table 57.0%Crown 36.5°Girdle: THN-STKPavilion 41°Culet: NoneDepth 62.6%

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: $10,284 AUD|Low: $4,657 AUD|High: $10,284 AUD|Avg: $6,171 AUD
NZ Jewellers
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 6, 2026
Retailer 14$4,657 AUD
Retailer 3$4,783 AUD
Retailer 5$5,123 AUD
Retailer 12$5,194 AUD
Retailer 6$5,890 AUD
Retailer 8$5,903 AUD
Retailer 9$5,903 AUD
Retailer 10$5,903 AUD
Retailer 13$6,113 AUD
Retailer 7$6,625 AUD
Retailer 11$6,811 AUD
Retailer 4$7,023 AUD
Retailer 2$7,604 AUD
NZ Jewellers$10,284 AUD

34 data points across 14 retailers

11 retailers$4,657 AUD to $10,284 AUD

B+
Cheapest Retailer
-
$4,657 AUD
B
Retailer 2
-
$5,123 AUD
View
B
Retailer 3
-
$5,194 AUD
View
B
Retailer 4
-
$5,903 AUD
View
Retailer 5
-
$5,903 AUD
View
Price last confirmed 8 days ago
B
Retailer 6
-
$5,903 AUD
View
B
Retailer 7
-
$6,113 AUD
View
B
Retailer 8
-
$6,625 AUD
View
B
Retailer 9
-
$6,811 AUD
View
B
Retailer 10
-
$7,604 AUD
View
Most Expensive
C
NZ Jewellers
78ce4ef3-6b18-4628-9613-46d7894a51ad · Nov 5
$10,284 AUD
$7,199 USD
View
10 more retailers have this diamond
Prices start from $4,657 AUDSave up to $5,627 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
$4,657 AUD