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Round|Natural|GIA

1.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 3425008603

Certificate GIA 3425008603

Diamond specifications and retailer prices

From $5,631 AUD
As of November 6, 2026
Save $7,165 AUD (56%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $12,797 AUD at NZ Jewellers · As of November 5, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3425008603. Listed at 16 retailers as of November 5, 2026, with prices from $5,631 to $12,797, a $7,165 spread on the same certified stone. NZ Jewellers lists it at $12,797. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 3425008603
Dimensions7.29 × 7.26 × 4.54 mm
L/W Ratio1.00
Top View
7.29 mm7.26 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3425008603
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.4%

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 6
Current: $12,797 AUD|Low: $5,594 AUD|High: $12,797 AUD|Avg: $8,067 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
Retailer 15
November 6, 2026
Retailer 13$5,631 AUD
Retailer 3$5,761 AUD
Retailer 11$5,885 AUD
Retailer 5$6,451 AUD
Retailer 14$6,457 AUD
Retailer 4$6,931 AUD
Retailer 15$6,931 AUD
Retailer 6$7,302 AUD
Retailer 9$7,342 AUD
Retailer 12$7,878 AUD
Retailer 7$7,998 AUD
Retailer 2$8,331 AUD
Retailer 8$9,335 AUD
Retailer 10$12,152 AUD
NZ Jewellers$12,797 AUD

38 data points across 15 retailers

16 retailers$5,631 AUD to $12,797 AUD

B+
Cheapest Retailer
-
$5,631 AUD
B+
Retailer 2
-
$5,761 AUD
View
A
Retailer 3
-
$5,885 AUD
View
B+
Retailer 4
-
$6,451 AUD
View
B+
Retailer 5
-
$6,457 AUD
View
B+
Retailer 6
-
$6,931 AUD
View
B+
Retailer 7
-
$6,931 AUD
View
B
Retailer 8
-
$7,302 AUD
View
B+
Retailer 9
-
$7,342 AUD
View
B+
Retailer 10
-
$7,878 AUD
View
B
Retailer 11
-
$7,998 AUD
View
B+
Retailer 12
-
$8,331 AUD
View
Retailer 13
-
$8,568 AUD
View
Price last confirmed 14 days ago
B
Retailer 14
-
$9,335 AUD
View
B
Retailer 15
-
$12,152 AUD
View
Most Expensive
B
NZ Jewellers
d005f766-8512-42a3-90e3-1ed707413889 · Nov 5
$12,797 AUD
$8,958 USD
View
15 more retailers have this diamond
Prices start from $5,631 AUDSave up to $7,165 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
$5,631 AUD