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Round|Natural|GIA

1.20ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6545318689

Certificate GIA 6545318689

Diamond specifications and retailer prices

From $2,458 AUD
As of November 6, 2026
Save $3,193 AUD (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $6,763 AUD at NZ Jewellers · As of October 3, 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6545318689. Listed at 18 retailers as of November 4, 2026, with a 130% 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

1.20
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6545318689
Dimensions6.83 × 6.88 × 4.14 mm
L/W Ratio1.01
Top View
6.83 mm6.88 mm1.20 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545318689
Side View
Table 58.0%Crown 34.5°Girdle: MediumPavilion 40.6°Culet: NoneDepth 60.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $2,551 AUD|Low: $2,422 AUD|High: $5,734 AUD|Avg: $3,491 AUD|-2.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6$2,458 AUD
Retailer 1$2,551 AUD
Retailer 4$3,075 AUD
Retailer 7$3,078 AUD
Retailer 2$3,494 AUD
Retailer 3$4,008 AUD
Retailer 5$5,651 AUD

40 data points across 7 retailers

18 retailers$2,458 AUD to $5,651 AUD

A
Cheapest Retailer
-
$2,458 AUD
A
Retailer 2
-
$2,551 AUD
View
B+
Retailer 3
-
$3,062 AUD
View
A
Retailer 4
-
$3,075 AUD
View
B+
Retailer 5
-
$3,078 AUD
View
B+
Retailer 6
-
$3,216 AUD
View
Retailer 7
-
$3,235 AUD
View
Price last confirmed 39 days ago
Retailer 8
-
$3,235 AUD
View
Price last confirmed 25 days ago
Retailer 9
-
$3,235 AUD
View
Price last confirmed 29 days ago
Retailer 10
-
$3,384 AUD
View
Price last confirmed 38 days ago
B+
Retailer 11
-
$3,410 AUD
View
B+
Retailer 12
-
$3,436 AUD
View
B+
Retailer 13
-
$3,494 AUD
View
Retailer 14
-
$3,733 AUD
View
Price last confirmed 38 days ago
B+
Retailer 15
-
$4,008 AUD
View
B
Retailer 16
-
$5,651 AUD
View
Retailer 17
-
$6,763 AUD
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
ad6de7aa-92fd-429a-8558-af53a9c48c2c · Oct 3
$6,763 AUD
$4,647 USD
View
Price last confirmed 34 days ago
17 more retailers have this diamond
Prices start from $2,458 AUDSave up to $3,193 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
$2,458 AUD