Radiant|Natural|GIA

1.21ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 2558197624

Certificate GIA 2558197624

Diamond specifications and retailer prices

From €1,433 EUR
As of November 6, 2026
Save €1,904 EUR (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €3,337 EUR at MOH London · As of November 7, 2026
View at MOH London

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2558197624. Listed at 14 retailers as of November 6, 2026, with prices from €1,433 to €3,337, a €1,904 spread on the same certified stone. MOH London lists it at €3,337. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2558197624
Dimensions7.23 × 5.56 × 3.78 mm
L/W Ratio1.30
Top View
7.23 mm5.56 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2558197624
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.0%

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: €3,337 EUR|Low: €1,433 EUR|High: €3,416 EUR|Avg: €2,112 EUR|-2.3%
MOH London
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 11€1,433 EUR
Retailer 5€1,506 EUR
Retailer 8€1,782 EUR
Retailer 3€1,927 EUR
Retailer 6€1,997 EUR
Retailer 10€2,006 EUR
Retailer 12€2,039 EUR
Retailer 2€2,080 EUR
Retailer 4€2,209 EUR
Retailer 9€2,337 EUR
Retailer 7€2,602 EUR
MOH London€3,337 EUR

30 data points across 12 retailers

14 retailers€1,433 EUR to €3,337 EUR

A
Cheapest Retailer
-
€1,433 EUR
A
Retailer 2
-
€1,506 EUR
View
B+
Retailer 3
-
€1,782 EUR
View
B+
Retailer 4
-
€1,816 EUR
View
Retailer 5
-
€1,927 EUR
View
Price last confirmed 9 days ago
B+
Retailer 6
-
€1,997 EUR
View
B+
Retailer 7
-
€2,006 EUR
View
B+
Retailer 8
-
€2,013 EUR
View
B+
Retailer 9
-
€2,039 EUR
View
B+
Retailer 10
-
€2,080 EUR
View
B
Retailer 11
-
€2,337 EUR
View
Retailer 12
-
€2,382 EUR
View
Price last confirmed 32 days ago
B
Retailer 13
-
€2,602 EUR
View
Most Expensive
B
MOH London
599C3FF43 · Nov 7
€3,337 EUR
£2,934 GBP
View
13 more retailers have this diamond
Prices start from €1,433 EURSave up to €1,904 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 Radiant
€1,433 EUR