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Round|Natural|GIA

1.51ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 7508361844

Certificate GIA 7508361844

Diamond specifications and retailer prices

From $3,847 AUD
As of November 4, 2026
Save $5,134 AUD (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $8,981 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 7508361844. Listed at 13 retailers as of November 4, 2026, with prices from $3,847 to $8,981, a $5,134 spread on the same certified stone. NZ Jewellers lists it at $8,981. 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
FluorescenceNone
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 7508361844
Dimensions7.30 × 7.35 × 4.62 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Key to symbols
Feather, Twinning Wisp, Crystal, Needle
Top View
7.30 mm7.35 mm1.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7508361844
Side View
Table 56.0%Crown 34.5°Girdle: STK-MEDPavilion 41.6°Culet: NoneDepth 63.0%

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 4
Current: $8,981 AUD|Low: $3,847 AUD|High: $8,981 AUD|Avg: $5,006 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
November 6, 2026
Retailer 7$3,847 AUD
Retailer 9$3,967 AUD
Retailer 11$4,295 AUD
Retailer 12$4,295 AUD
Retailer 6$4,461 AUD
Retailer 4$4,498 AUD
Retailer 5$4,704 AUD
Retailer 8$4,908 AUD
Retailer 10$4,957 AUD
Retailer 3$5,111 AUD
Retailer 2$5,670 AUD
NZ Jewellers$8,981 AUD

35 data points across 12 retailers

13 retailers$3,847 AUD to $8,981 AUD

B+
Cheapest Retailer
-
$3,847 AUD
B+
Retailer 2
-
$3,967 AUD
View
Retailer 3
-
$4,295 AUD
View
Price last confirmed 60 days ago
Retailer 4
-
$4,295 AUD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$4,295 AUD
View
B+
Retailer 6
-
$4,461 AUD
View
B+
Retailer 7
-
$4,498 AUD
View
B+
Retailer 8
-
$4,704 AUD
View
B
Retailer 9
-
$4,908 AUD
View
Retailer 10
-
$4,957 AUD
View
Price last confirmed 60 days ago
B
Retailer 11
-
$4,957 AUD
View
B
Retailer 12
-
$5,670 AUD
View
Most Expensive
C
NZ Jewellers
c14ff665-9328-4d6b-9dba-aea7e48398d8 · Nov 5
$8,981 AUD
$6,287 USD
View
12 more retailers have this diamond
Prices start from $3,847 AUDSave up to $5,134 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
$3,847 AUD