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Round|Natural|GIA

1.21ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 5423150018

Certificate GIA 5423150018

Diamond specifications and retailer prices

From €1,821 EUR
As of November 6, 2026
Save €2,913 EUR (62%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €4,734 EUR at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct 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 5423150018. Listed at 9 retailers as of November 5, 2026, with prices from €1,821 to €4,734, a €2,913 spread on the same certified stone. NZ Jewellers lists it at €4,734. 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

1.21
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5423150018
Dimensions6.83 × 6.79 × 4.26 mm
L/W Ratio1.01
Top View
6.83 mm6.79 mm1.21 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5423150018
Side View
Table 55.0%Crown 35.5°GirdlePavilion 41°Culet: NoneDepth 62.6%

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: €2,822 EUR|Low: €1,821 EUR|High: €4,015 EUR|Avg: €2,683 EUR|+2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 4€1,821 EUR
Retailer 5€2,146 EUR
Retailer 2€2,405 EUR
Retailer 1€2,822 EUR
Retailer 3€3,987 EUR

42 data points across 5 retailers

9 retailers€1,821 EUR to €4,734 EUR

A
Cheapest Retailer
-
€1,821 EUR
B+
Retailer 2
-
€2,051 EUR
View
B+
Retailer 3
-
€2,146 EUR
View
B
Retailer 4
-
€2,367 EUR
View
B+
Retailer 5
-
€2,405 EUR
View
B
Retailer 6
-
€2,822 EUR
View
B
Retailer 7
-
€3,291 EUR
View
Retailer 8
-
€3,987 EUR
View
Price last confirmed 8 days ago
Most Expensive
C
NZ Jewellers
6d102739-0765-4f66-bfa8-7da1dfd07ccb · Nov 5
€4,734 EUR
$5,285 USD
View
8 more retailers have this diamond
Prices start from €1,821 EURSave up to €2,913 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
1.21ct Round
€1,821 EUR