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Round|Natural|GIA

1.50ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6552666632

Certificate GIA 6552666632

Diamond specifications and retailer prices

From $5,606 AUD
As of November 6, 2026
Save $6,529 AUD (54%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $13,518 AUD at NZ Jewellers · As of October 3, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6552666632. Listed at 10 retailers as of November 4, 2026, with a 116% 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6552666632
Dimensions7.21 × 7.27 × 4.55 mm
L/W Ratio1.01
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
7.21 mm7.27 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552666632
Side View
Table 57.0%CrownGirdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.9%

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: $7,815 AUD|Low: $5,606 AUD|High: $13,168 AUD|Avg: $8,192 AUD|-8.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$5,606 AUD
Retailer 4$6,386 AUD
Retailer 6$6,704 AUD
Retailer 7$7,216 AUD
Retailer 1$7,815 AUD
Retailer 2$8,559 AUD
Retailer 3$12,135 AUD

38 data points across 7 retailers

10 retailers$5,606 AUD to $12,135 AUD

A
Cheapest Retailer
-
$5,606 AUD
A
Retailer 2
-
$6,386 AUD
View
A
Retailer 3
-
$6,704 AUD
View
Retailer 4
-
$7,216 AUD
View
Price last confirmed 10 days ago
A
Retailer 5
-
$7,815 AUD
View
Retailer 6
-
$7,993 AUD
View
Price last confirmed 30 days ago
Retailer 7
-
$8,171 AUD
View
Price last confirmed 38 days ago
B+
Retailer 8
-
$8,559 AUD
View
B
Retailer 9
-
$12,135 AUD
View
Most Expensive
NZ Jewellers
2d7a0237-178a-4684-bb3e-0b57bca90f86 · Oct 3
$13,518 AUD
$9,288 USD
View
Price last confirmed 34 days ago
9 more retailers have this diamond
Prices start from $5,606 AUDSave up to $6,529 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
$5,606 AUD