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Radiant|Natural|GIA

1.21ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 1548532980

Certificate GIA 1548532980

Diamond specifications and retailer prices

From €1,862 EUR
£1,645 GBP
As of November 2, 2026
Save €1,483 EUR (44%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €4,061 EUR at NZ Jewellers · As of September 29, 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 I 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 1548532980. Listed at 9 retailers as of November 2, 2026, with a 80% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle44.82°
Pavilion angle30.69°
OriginNatural
Grading LabGIA
CertificateGIA 1548532980
Dimensions6.71 × 5.25 × 3.65 mm
L/W Ratio1.28
Girdle conditionThick
Key to symbols
Twinning Wisp, Feather, Crystal
Top View
6.71 mm5.25 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1548532980
Side View
Table 65.0%Crown 44.82°GirdlePavilion 30.69°CuletDepth 69.5%

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 2
Current: €3,345 EUR|Low: €1,862 EUR|High: €3,444 EUR|Avg: €2,414 EUR|-1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 2€1,862 EUR
Retailer 3€1,926 EUR
Retailer 6€2,250 EUR
Retailer 5€2,271 EUR
Retailer 4€2,389 EUR
Retailer 7€2,395 EUR
Retailer 1€3,345 EUR

37 data points across 7 retailers

9 retailers€1,862 EUR to €3,345 EUR

A
Cheapest Retailer
-
€1,862 EUR
£1,645 GBP
A
Retailer 2
-
€1,926 EUR
$2,160 USD
View
Retailer 3
-
€1,943 EUR
$2,179 USD
View
Price last confirmed 38 days ago
Retailer 4
-
€1,943 EUR
$2,179 USD
View
Price last confirmed 26 days ago
Retailer 5
-
€2,032 EUR
$2,279 USD
View
Price last confirmed 33 days ago
Retailer 6
-
€2,389 EUR
A$4,122 AUD
View
Price last confirmed 27 days ago
B
Retailer 7
-
€3,345 EUR
£2,954 GBP
View
Retailer 8
-
€4,061 EUR
$4,555 USD
View
Price last confirmed 36 days ago
Most Expensive
NZ Jewellers
a87d2050-7c7a-48c5-9bc4-636ec81b0fa6 · Sep 29
€4,061 EUR
$4,555 USD
View
Price last confirmed 34 days ago
8 more retailers have this diamond
Prices start from €1,862 EURSave up to €1,483 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
€1,862 EUR