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Radiant|Natural|GIA

1.21ct F SI1 Radiant Natural Diamond

ID • F/SI1 • GIA 5231753899

Certificate GIA 5231753899

Diamond specifications and retailer prices

From €3,074 EUR
As of November 2, 2026
Save €2,937 EUR (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €6,262 EUR at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5231753899. Listed at 15 retailers as of November 1, 2026, with a 96% 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

1.21
Carat
F
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.84°
Pavilion angle31.37°
OriginNatural
Grading LabGIA
CertificateGIA 5231753899
Dimensions6.75 × 5.25 × 3.63 mm
L/W Ratio1.29
Top View
6.75 mm5.25 mm1.21 ctF / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231753899
Side View
Table 65.0%Crown 44.84°Girdle: ThickPavilion 31.37°Culet: NoneDepth 69.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 2
Current: €6,262 EUR|Low: €3,074 EUR|High: €7,639 EUR|Avg: €4,428 EUR|-18.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 3, 2026
Retailer 5€3,074 EUR
Retailer 9€3,124 EUR
Retailer 3€3,219 EUR
Retailer 4€3,511 EUR
Retailer 6€3,576 EUR
Retailer 11€3,576 EUR
Retailer 2€3,713 EUR
Retailer 12€3,717 EUR
Retailer 14€3,717 EUR
Retailer 13€3,842 EUR
Retailer 7€3,999 EUR
Retailer 10€5,245 EUR
Retailer 8€6,011 EUR
NZ Jewellers€6,262 EUR

39 data points across 14 retailers

15 retailers€3,074 EUR to €6,011 EUR

B+
Cheapest Retailer
-
€3,074 EUR
B+
Retailer 2
-
€3,124 EUR
View
B+
Retailer 3
-
€3,219 EUR
View
Retailer 4
-
€3,511 EUR
View
Price last confirmed 9 days ago
B+
Retailer 5
-
€3,576 EUR
View
B+
Retailer 6
-
€3,576 EUR
View
B+
Retailer 7
-
€3,713 EUR
View
Retailer 8
-
€3,717 EUR
View
Price last confirmed 8 days ago
Retailer 9
-
€3,717 EUR
View
Price last confirmed 8 days ago
Retailer 10
-
€3,842 EUR
View
Price last confirmed 8 days ago
B+
Retailer 11
-
€3,999 EUR
View
B
Retailer 12
-
€4,510 EUR
View
Retailer 13
-
€5,245 EUR
View
Price last confirmed 11 days ago
B
Retailer 14
-
€6,011 EUR
View
Most Expensive
NZ Jewellers
35a80dc2-e68c-4c01-970b-8ebe5c41a2e5 · Oct 30
€6,262 EUR
$6,992 USD
View
Price last confirmed 7 days ago
14 more retailers have this diamond
Prices start from €3,074 EURSave up to €2,937 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.

B+
1.21ct Radiant
€3,074 EUR