Round|Natural|GIA

1.20ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6545442420

Certificate GIA 6545442420

Diamond specifications and retailer prices

From $2,035 USD
As of November 6, 2026
Save $2,633 USD (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $5,586 USD 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
Color
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: $2,104 USD|Low: $2,035 USD|High: $4,737 USD|Avg: $3,031 USD|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8$2,035 USD
Retailer 1$2,104 USD
Retailer 5$2,368 USD
Retailer 3$2,811 USD
Retailer 2$2,823 USD
Retailer 4$3,261 USD
Retailer 6$3,314 USD
Retailer 7$4,668 USD

34 data points across 8 retailers

18 retailers$2,035 USD to $4,668 USD

A
Cheapest Retailer
-
$2,035 USD
A
Retailer 2
-
$2,104 USD
View
B+
Retailer 3
-
$2,368 USD
View
B+
Retailer 4
-
$2,484 USD
View
B+
Retailer 5
-
$2,514 USD
View
B+
Retailer 6
-
$2,515 USD
View
Retailer 7
-
$2,672 USD
View
Price last confirmed 39 days ago
Retailer 8
-
$2,672 USD
View
Price last confirmed 25 days ago
B
Retailer 9
-
$2,730 USD
View
Retailer 10
-
$2,775 USD
View
Price last confirmed 38 days ago
B+
Retailer 11
-
$2,811 USD
View
B
Retailer 12
-
$2,812 USD
View
B
Retailer 13
-
$2,823 USD
View
Retailer 14
-
$3,083 USD
View
Price last confirmed 38 days ago
B
Retailer 15
-
$3,261 USD
View
B
Retailer 16
-
$3,314 USD
View
B
Retailer 17
-
$4,668 USD
View
Most Expensive
NZ Jewellers
fb4b624f-56ed-4d45-9c91-33d05b7f11c1 · Sep 28
$5,586 USD
View
Price last confirmed 39 days ago
17 more retailers have this diamond
Prices start from $2,035 USDSave up to $2,633 USD

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
$2,035 USD