Round|Natural|GIA

1.20ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6545318689

Certificate GIA 6545318689

Diamond specifications and retailer prices

From $1,689 USD
As of November 6, 2026
Save $2,194 USD (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $4,647 USD 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
Color
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

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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: $1,753 USD|Low: $1,664 USD|High: $3,940 USD|Avg: $2,399 USD|-2.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6$1,689 USD
Retailer 1$1,753 USD
Retailer 4$2,113 USD
Retailer 7$2,115 USD
Retailer 2$2,401 USD
Retailer 3$2,754 USD
Retailer 5$3,883 USD

40 data points across 7 retailers

18 retailers$1,689 USD to $3,883 USD

A
Cheapest Retailer
-
$1,689 USD
A
Retailer 2
-
$1,753 USD
View
B+
Retailer 3
-
$2,104 USD
View
A
Retailer 4
-
$2,113 USD
View
B+
Retailer 5
-
$2,115 USD
View
B+
Retailer 6
-
$2,210 USD
View
Retailer 7
-
$2,223 USD
View
Price last confirmed 39 days ago
Retailer 8
-
$2,223 USD
View
Price last confirmed 25 days ago
Retailer 9
-
$2,223 USD
View
Price last confirmed 29 days ago
Retailer 10
-
$2,325 USD
View
Price last confirmed 38 days ago
B+
Retailer 11
-
$2,343 USD
View
B+
Retailer 12
-
$2,361 USD
View
B+
Retailer 13
-
$2,401 USD
View
Retailer 14
-
$2,565 USD
View
Price last confirmed 38 days ago
B+
Retailer 15
-
$2,754 USD
View
B
Retailer 16
-
$3,883 USD
View
Retailer 17
-
$4,647 USD
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
ad6de7aa-92fd-429a-8558-af53a9c48c2c · Oct 3
$4,647 USD
View
Price last confirmed 34 days ago
17 more retailers have this diamond
Prices start from $1,689 USDSave up to $2,194 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
$1,689 USD