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Round|Natural|GIA

1.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6435526632

Certificate GIA 6435526632

Diamond specifications and retailer prices

From $4,457 AUD
As of November 4, 2026
Save $5,243 AUD (54%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $11,085 AUD at NZ Jewellers · As of September 25, 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 6435526632. Listed at 16 retailers as of November 1, 2026, with a 118% 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6435526632
Dimensions7.33 × 7.29 × 4.56 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.33 mm7.29 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6435526632
Side View
Table 57.0%Crown 36°Girdle: MediumPavilion 41°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 4
Current: $5,838 AUD|Low: $4,457 AUD|High: $10,242 AUD|Avg: $5,802 AUD|-7.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 12$4,457 AUD
Retailer 8$4,514 AUD
Retailer 4$4,531 AUD
Retailer 13$4,664 AUD
Retailer 2$4,878 AUD
Retailer 3$4,935 AUD
Retailer 10$5,043 AUD
Retailer 11$5,255 AUD
Retailer 1$5,838 AUD
Retailer 7$6,343 AUD
Retailer 5$6,565 AUD
Retailer 6$7,080 AUD
Retailer 9$9,700 AUD

43 data points across 13 retailers

16 retailers$4,457 AUD to $9,700 AUD

A
Cheapest Retailer
-
$4,457 AUD
A
Retailer 2
-
$4,514 AUD
View
A
Retailer 3
-
$4,531 AUD
View
A
Retailer 4
-
$4,664 AUD
View
A
Retailer 5
-
$4,878 AUD
View
A
Retailer 6
-
$4,935 AUD
View
A
Retailer 7
-
$5,043 AUD
View
Retailer 8
-
$5,255 AUD
View
Price last confirmed 13 days ago
Retailer 9
-
$5,764 AUD
View
Price last confirmed 45 days ago
B+
Retailer 10
-
$5,838 AUD
View
B+
Retailer 11
-
$6,343 AUD
View
Retailer 12
-
$6,565 AUD
View
Price last confirmed 14 days ago
Retailer 13
-
$6,651 AUD
View
Price last confirmed 45 days ago
B+
Retailer 14
-
$7,080 AUD
View
B
Retailer 15
-
$9,700 AUD
View
Most Expensive
NZ Jewellers
2bf72783-4f62-4dcf-9291-b59d4f1f36b8 · Sep 25
$11,085 AUD
$7,760 USD
View
Price last confirmed 42 days ago
15 more retailers have this diamond
Prices start from $4,457 AUDSave up to $5,243 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
$4,457 AUD