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Round|Natural|GIA

1.20ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1328547279

Certificate GIA 1328547279

Diamond specifications and retailer prices

From $4,956 AUD
As of November 1, 2026
Save $6,094 AUD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $11,049 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1328547279. Listed at 21 retailers as of November 5, 2026, with prices from $4,956 to $11,049, a $6,094 spread on the same certified stone. NZ Jewellers lists it at $11,049. 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

1.20
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1328547279
Dimensions6.77 × 6.72 × 4.22 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.77 mm6.72 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1328547279
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $11,049 AUD|Low: $4,765 AUD|High: $11,049 AUD|Avg: $6,607 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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 7, 2026
Retailer 3$4,956 AUD
Retailer 19$4,956 AUD
Retailer 7$5,056 AUD
Retailer 13$5,251 AUD
Retailer 5$5,487 AUD
Retailer 14$5,691 AUD
Retailer 4$5,733 AUD
Retailer 10$5,746 AUD
Retailer 11$5,746 AUD
Retailer 2$6,383 AUD
Retailer 8$6,404 AUD
Retailer 20$6,404 AUD
Retailer 16$6,567 AUD
Retailer 9$6,622 AUD
Retailer 12$6,641 AUD
Retailer 17$6,709 AUD
Retailer 6$7,174 AUD
Retailer 15$7,738 AUD
Retailer 18$10,074 AUD
NZ Jewellers$11,049 AUD

39 data points across 20 retailers

21 retailers$4,956 AUD to $11,049 AUD

B+
Cheapest Retailer
-
$4,956 AUD
B+
Retailer 2
-
$4,956 AUD
View
B+
Retailer 3
-
$5,056 AUD
View
B+
Retailer 4
-
$5,251 AUD
View
Final sale: no returns
B+
Retailer 5
-
$5,260 AUD
View
B
Retailer 6
-
$5,487 AUD
View
B+
Retailer 7
-
$5,691 AUD
View
B+
Retailer 8
-
$5,733 AUD
View
B+
Retailer 9
-
$5,746 AUD
View
Retailer 10
-
$5,746 AUD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$6,383 AUD
View
B
Retailer 12
-
$6,404 AUD
View
B
Retailer 13
-
$6,404 AUD
View
B
Retailer 14
-
$6,567 AUD
View
B
Retailer 15
-
$6,622 AUD
View
Retailer 16
-
$6,641 AUD
View
Price last confirmed 29 days ago
B
Retailer 17
-
$6,709 AUD
View
Retailer 18
-
$7,174 AUD
View
Price last confirmed 15 days ago
B
Retailer 19
-
$7,738 AUD
View
B
Retailer 20
-
$10,074 AUD
View
Most Expensive
B
NZ Jewellers
ab56c08d-b5e9-43cc-b4c1-58d99346cb36 · Nov 5
$11,049 AUD
$7,592 USD
View
20 more retailers have this diamond
Prices start from $4,956 AUDSave up to $6,094 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.

B+
1.20ct Round
$4,956 AUD