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Round|Natural|GIA

1.20ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2557770796

Certificate GIA 2557770796

Diamond specifications and retailer prices

From $3,502 AUD
As of November 6, 2026
Save $4,413 AUD (56%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $7,914 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 2557770796. Listed at 24 retailers as of November 5, 2026, with prices from $3,502 to $7,914, a $4,413 spread on the same certified stone. NZ Jewellers lists it at $7,914. 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°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2557770796
Dimensions6.72 × 6.75 × 4.22 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.72 mm6.75 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557770796
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.6%

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: $7,914 AUD|Low: $3,483 AUD|High: $7,914 AUD|Avg: $4,995 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
Retailer 21
Retailer 22
Retailer 23
Retailer 24
November 6, 2026
Retailer 2$3,502 AUD
Retailer 3$3,502 AUD
Retailer 9$3,915 AUD
Retailer 11$3,940 AUD
Retailer 21$4,011 AUD
Retailer 8$4,068 AUD
Retailer 12$4,192 AUD
Retailer 24$4,256 AUD
Retailer 10$4,417 AUD
Retailer 5$4,542 AUD
Retailer 7$4,542 AUD
Retailer 18$4,643 AUD
Retailer 6$4,717 AUD
Retailer 4$4,750 AUD
Retailer 13$4,881 AUD
Retailer 22$5,129 AUD
Retailer 19$5,221 AUD
Retailer 14$5,241 AUD
Retailer 17$5,433 AUD
Retailer 20$5,544 AUD
Retailer 16$6,605 AUD
Retailer 15$6,788 AUD
Retailer 23$7,575 AUD
NZ Jewellers$7,914 AUD

25 data points across 24 retailers

24 retailers$3,502 AUD to $7,914 AUD

A
Cheapest Retailer
-
$3,502 AUD
A
Retailer 2
-
$3,502 AUD
View
A
Retailer 3
-
$3,915 AUD
View
A
Retailer 4
-
$3,940 AUD
View
A
Retailer 5
-
$4,011 AUD
View
A
Retailer 6
-
$4,068 AUD
View
A
Retailer 7
-
$4,192 AUD
View
Final sale: no returns
A
Retailer 8
-
$4,256 AUD
View
B+
Retailer 9
-
$4,417 AUD
View
Retailer 10
-
$4,542 AUD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$4,542 AUD
View
B+
Retailer 12
-
$4,643 AUD
View
B+
Retailer 13
-
$4,717 AUD
View
B+
Retailer 14
-
$4,750 AUD
View
B+
Retailer 15
-
$4,881 AUD
View
Retailer 16
-
$5,046 AUD
View
Price last confirmed 34 days ago
B+
Retailer 17
-
$5,129 AUD
View
B+
Retailer 18
-
$5,221 AUD
View
B+
Retailer 19
-
$5,241 AUD
View
B+
Retailer 20
-
$5,544 AUD
View
B
Retailer 21
-
$6,605 AUD
View
B
Retailer 22
-
$6,788 AUD
View
B
Retailer 23
-
$7,575 AUD
View
Most Expensive
B
NZ Jewellers
2083813b-8946-41b4-958e-caac659d28fe · Nov 5
$7,914 AUD
$5,438 USD
View
23 more retailers have this diamond
Prices start from $3,502 AUDSave up to $4,413 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
1.20ct Round
$3,502 AUD