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Round|Natural|GIA

1.21ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2243122857

Certificate GIA 2243122857

Diamond specifications and retailer prices

From €1,961 EUR
As of November 6, 2026
Save €1,583 EUR (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €3,544 EUR at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2243122857. Listed at 12 retailers as of November 6, 2026, with prices from €1,961 to €3,544, a €1,583 spread on the same certified stone. Helzberg Diamonds lists it at €3,544. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2243122857
Dimensions6.81 × 6.83 × 4.25 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.81 mm6.83 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2243122857
Side View
Table 56.0%Crown 34°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: €3,544 EUR|Low: €1,961 EUR|High: €3,544 EUR|Avg: €2,561 EUR
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 5€1,961 EUR
Retailer 2€2,104 EUR
Retailer 3€2,142 EUR
Retailer 11€2,153 EUR
Retailer 8€2,221 EUR
Retailer 6€2,462 EUR
Retailer 10€2,465 EUR
Retailer 7€2,481 EUR
Retailer 9€2,527 EUR
Retailer 12€3,015 EUR
Retailer 4€3,223 EUR
Helzberg Diamonds€3,544 EUR

4 data points across 12 retailers

12 retailers€1,961 EUR to €3,544 EUR

A
Cheapest Retailer
-
€1,961 EUR
B+
Retailer 2
-
€2,104 EUR
View
B+
Retailer 3
-
€2,142 EUR
View
B+
Retailer 4
-
€2,153 EUR
View
B+
Retailer 5
-
€2,221 EUR
View
B
Retailer 6
-
€2,462 EUR
View
B
Retailer 7
-
€2,465 EUR
View
B+
Retailer 8
-
€2,481 EUR
View
B
Retailer 9
-
€2,527 EUR
View
B
Retailer 10
-
€3,015 EUR
View
B
Retailer 11
-
€3,223 EUR
View
Most Expensive
B
Helzberg Diamonds
XZRIIKJHIIOLN · Nov 6
€3,544 EUR
$3,957 USD
View
11 more retailers have this diamond
Prices start from €1,961 EURSave up to €1,583 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
€1,961 EUR