Radiant|Natural|GIA

1.21ct I SI2 Radiant Natural Diamond

EX • I/SI2 • GIA 2557742575

Certificate GIA 2557742575

Diamond specifications and retailer prices

From $2,269 USD
As of November 3, 2026
Save $1,458 USD (39%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $5,358 USD at NZ Jewellers · As of October 11, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557742575. Listed at 7 retailers as of November 3, 2026, with a 64% 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
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557742575
Dimensions7.22 × 5.34 × 3.51 mm
L/W Ratio1.35
Girdle conditionPolished
Top View
7.22 mm5.34 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557742575
Side View
Table 67.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 65.7%

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 3
Current: $5,358 USD|Low: $1,856 USD|High: $5,440 USD|Avg: $2,937 USD|-1.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 3, 2026
Retailer 9$1,856 USD
Retailer 10$2,269 USD
Retailer 8$2,365 USD
Retailer 5$2,378 USD
Retailer 11$2,533 USD
Retailer 7$2,564 USD
Retailer 12$2,603 USD
Retailer 4$2,830 USD
Retailer 6$3,023 USD
Retailer 2$3,727 USD
Retailer 3$4,544 USD
NZ Jewellers$5,358 USD

11 data points across 12 retailers

7 retailers$2,269 USD to $3,727 USD

Retailer 1
-
$1,856 USD
HK$14,500 HKD
Price last confirmed 22 days ago
A
Retailer 2
-
$2,269 USD
View
A
Retailer 3
-
$2,378 USD
£1,873 GBP
View
B+
Retailer 4
-
$2,533 USD
View
Retailer 5
-
$2,830 USD
View
Price last confirmed 21 days ago
B
Retailer 6
-
$3,727 USD
View
Most Expensive
NZ Jewellers
538ffc4d-5d2d-4a9b-8e3d-4341c6573678 · Oct 11
$5,358 USD
View
Price last confirmed 22 days ago
6 more retailers have this diamond
Prices start from $2,269 USDSave up to $1,458 USD

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
$2,269 USD