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Round|Natural|GIA

1.50ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 5403991543

Certificate GIA 5403991543

Diamond specifications and retailer prices

From $4,580 AUD
As of November 4, 2026
Save $6,155 AUD (57%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $10,932 AUD at NZ Jewellers · As of September 10, 2026
View at NZ Jewellers

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5403991543. Listed at 23 retailers as of November 4, 2026, with a 134% 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

1.50
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 5403991543
Dimensions7.31 × 7.25 × 4.56 mm
L/W Ratio1.01
Top View
7.31 mm7.25 mm1.50 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5403991543
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.6%

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 4
Current: $10,735 AUD|Low: $4,124 AUD|High: $10,932 AUD|Avg: $6,786 AUD|-1.8%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 14$4,580 AUD
Retailer 6$4,735 AUD
Retailer 4$4,737 AUD
Retailer 7$4,814 AUD
Retailer 8$4,860 AUD
Retailer 5$4,913 AUD
Retailer 16$5,571 AUD
Retailer 3$5,583 AUD
Retailer 17$5,583 AUD
Retailer 19$5,583 AUD
Retailer 9$5,961 AUD
Retailer 18$6,075 AUD
Retailer 2$6,165 AUD
Retailer 10$6,441 AUD
Retailer 13$6,513 AUD
Retailer 12$6,965 AUD
Retailer 11$8,910 AUD
Retailer 15$9,814 AUD
NZ Jewellers$10,735 AUD

43 data points across 19 retailers

23 retailers$4,580 AUD to $10,735 AUD

A
Cheapest Retailer
-
$4,580 AUD
A
Retailer 2
-
$4,735 AUD
View
A
Retailer 3
-
$4,737 AUD
View
A
Retailer 4
-
$4,814 AUD
View
A
Retailer 5
-
$4,860 AUD
View
A
Retailer 6
-
$4,913 AUD
View
B+
Retailer 7
-
$5,571 AUD
View
B+
Retailer 8
-
$5,583 AUD
View
Retailer 9
-
$5,583 AUD
View
Price last confirmed 8 days ago
B+
Retailer 10
-
$5,583 AUD
View
Retailer 11
-
$5,685 AUD
View
Price last confirmed 56 days ago
Retailer 12
-
$5,801 AUD
View
Price last confirmed 14 days ago
B+
Retailer 13
-
$5,961 AUD
View
B+
Retailer 14
-
$6,075 AUD
View
B+
Retailer 15
-
$6,165 AUD
View
B+
Retailer 16
-
$6,441 AUD
View
B+
Retailer 17
-
$6,513 AUD
View
Retailer 18
-
$6,560 AUD
View
Price last confirmed 60 days ago
B+
Retailer 19
-
$6,965 AUD
View
B
Retailer 20
-
$8,910 AUD
View
B
Retailer 21
-
$9,814 AUD
View
B
Retailer 22
-
$10,735 AUD
View
Most Expensive
NZ Jewellers
b87281be-c421-4565-b3fd-f27d96f175c9 · Sep 10
$10,932 AUD
$7,653 USD
View
Price last confirmed 56 days ago
22 more retailers have this diamond
Prices start from $4,580 AUDSave up to $6,155 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
1.50ct Round
$4,580 AUD