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Round|Natural|GIA

1.20ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6545442420

Certificate GIA 6545442420

Diamond specifications and retailer prices

From $2,962 AUD
As of November 6, 2026
Save $3,832 AUD (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $8,130 AUD at NZ Jewellers · As of September 28, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6545442420. Listed at 18 retailers as of November 4, 2026, with a 129% 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 6545442420
Dimensions6.79 × 6.84 × 4.23 mm
L/W Ratio1.01
Top View
6.79 mm6.84 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545442420
Side View
Table 58.0%Crown 34°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.1%

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: $3,062 AUD|Low: $2,962 AUD|High: $6,894 AUD|Avg: $4,411 AUD|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8$2,962 AUD
Retailer 1$3,062 AUD
Retailer 5$3,446 AUD
Retailer 3$4,091 AUD
Retailer 2$4,109 AUD
Retailer 4$4,746 AUD
Retailer 6$4,823 AUD
Retailer 7$6,794 AUD

34 data points across 8 retailers

18 retailers$2,962 AUD to $6,794 AUD

A
Cheapest Retailer
-
$2,962 AUD
A
Retailer 2
-
$3,062 AUD
View
B+
Retailer 3
-
$3,446 AUD
View
B+
Retailer 4
-
$3,615 AUD
View
B+
Retailer 5
-
$3,659 AUD
View
B+
Retailer 6
-
$3,660 AUD
View
Retailer 7
-
$3,889 AUD
View
Price last confirmed 39 days ago
Retailer 8
-
$3,889 AUD
View
Price last confirmed 25 days ago
B
Retailer 9
-
$3,973 AUD
View
Retailer 10
-
$4,039 AUD
View
Price last confirmed 38 days ago
B+
Retailer 11
-
$4,091 AUD
View
B
Retailer 12
-
$4,093 AUD
View
B
Retailer 13
-
$4,109 AUD
View
Retailer 14
-
$4,487 AUD
View
Price last confirmed 38 days ago
B
Retailer 15
-
$4,746 AUD
View
B
Retailer 16
-
$4,823 AUD
View
B
Retailer 17
-
$6,794 AUD
View
Most Expensive
NZ Jewellers
fb4b624f-56ed-4d45-9c91-33d05b7f11c1 · Sep 28
$8,130 AUD
$5,586 USD
View
Price last confirmed 39 days ago
17 more retailers have this diamond
Prices start from $2,962 AUDSave up to $3,832 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
$2,962 AUD