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Round|Natural|GIA

1.50ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 6512578382

Certificate GIA 6512578382

Diamond specifications and retailer prices

From $9,782 AUD
As of November 6, 2026
Save $9,390 AUD (49%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $23,893 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6512578382. Listed at 19 retailers as of November 4, 2026, with a 96% 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
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6512578382
Dimensions7.35 × 7.30 × 4.50 mm
L/W Ratio1.01
Top View
7.35 mm7.30 mm1.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6512578382
Side View
Table 61.0%Crown 33.5°Girdle: Slightly ThickPavilion 41.8°Culet: NoneDepth 61.6%

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 6
Current: $12,757 AUD|Low: $9,782 AUD|High: $19,523 AUD|Avg: $13,364 AUD|-4.3%
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
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 10$9,782 AUD
Retailer 3$10,528 AUD
Retailer 16$10,717 AUD
Retailer 5$11,361 AUD
Retailer 12$11,509 AUD
Retailer 6$11,957 AUD
Retailer 4$12,078 AUD
Retailer 11$12,592 AUD
Retailer 8$12,674 AUD
Retailer 7$12,731 AUD
Retailer 1$12,757 AUD
Retailer 15$13,662 AUD
Retailer 9$14,126 AUD
Retailer 14$14,346 AUD
Retailer 13$16,142 AUD
Retailer 2$19,172 AUD

27 data points across 16 retailers

19 retailers$9,782 AUD to $19,172 AUD

A
Cheapest Retailer
-
$9,782 AUD
A
Retailer 2
-
$10,528 AUD
View
A
Retailer 3
-
$10,717 AUD
View
Retailer 4
-
$11,007 AUD
View
Price last confirmed 25 days ago
Retailer 5
-
$11,361 AUD
View
Price last confirmed 3 days ago
A
Retailer 6
-
$11,509 AUD
View
B+
Retailer 7
-
$11,957 AUD
View
B+
Retailer 8
-
$12,078 AUD
View
B+
Retailer 9
-
$12,592 AUD
View
Retailer 10
-
$12,674 AUD
View
Price last confirmed 14 days ago
B+
Retailer 11
-
$12,731 AUD
View
Final sale: no returns
B+
Retailer 12
-
$12,757 AUD
View
B+
Retailer 13
-
$13,638 AUD
View
B+
Retailer 14
-
$13,662 AUD
View
B
Retailer 15
-
$14,126 AUD
View
B+
Retailer 16
-
$14,346 AUD
View
B+
Retailer 17
-
$16,142 AUD
View
B
Retailer 18
-
$19,172 AUD
View
Most Expensive
NZ Jewellers
a1d63ee0-7b43-4040-956c-98c5f1f68ef7 · Sep 25
$23,893 AUD
$16,726 USD
View
Price last confirmed 42 days ago
18 more retailers have this diamond
Prices start from $9,782 AUDSave up to $9,390 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
$9,782 AUD