Round|Natural|GIA

1.20ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6545442420

Certificate GIA 6545442420

Diamond specifications and retailer prices

From €1,823 EUR
As of November 6, 2026
Save €2,358 EUR (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €5,003 EUR 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: €2,518 EUR|Low: €1,823 EUR|High: €4,243 EUR|Avg: €2,711 EUR|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 8€1,823 EUR
Retailer 3€1,884 EUR
Retailer 6€2,121 EUR
Retailer 1€2,518 EUR
Retailer 4€2,528 EUR
Retailer 5€2,921 EUR
Retailer 2€2,982 EUR
Retailer 7€4,181 EUR

34 data points across 8 retailers

18 retailers€1,823 EUR to €4,181 EUR

A
Cheapest Retailer
-
€1,823 EUR
A
Retailer 2
-
€1,884 EUR
View
B+
Retailer 3
-
€2,121 EUR
View
B+
Retailer 4
-
€2,225 EUR
View
B+
Retailer 5
-
€2,252 EUR
View
B+
Retailer 6
-
€2,253 EUR
View
Retailer 7
-
€2,393 EUR
View
Price last confirmed 40 days ago
Retailer 8
-
€2,393 EUR
View
Price last confirmed 26 days ago
B
Retailer 9
-
€2,445 EUR
View
Retailer 10
-
€2,485 EUR
View
Price last confirmed 39 days ago
B+
Retailer 11
-
€2,518 EUR
View
B
Retailer 12
-
€2,519 EUR
View
B
Retailer 13
-
€2,528 EUR
View
Retailer 14
-
€2,761 EUR
View
Price last confirmed 39 days ago
B
Retailer 15
-
€2,921 EUR
View
B
Retailer 16
-
€2,982 EUR
View
B
Retailer 17
-
€4,181 EUR
View
Most Expensive
NZ Jewellers
fb4b624f-56ed-4d45-9c91-33d05b7f11c1 · Sep 28
€5,003 EUR
$5,586 USD
View
Price last confirmed 39 days ago
17 more retailers have this diamond
Prices start from €1,823 EURSave up to €2,358 EUR

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
€1,823 EUR