Radiant|Natural|GIA

1.21ct F SI1 Radiant Natural Diamond

ID • F/SI1 • GIA 5231753899

Certificate GIA 5231753899

Diamond specifications and retailer prices

From $3,432 USD
As of November 2, 2026
Save $3,279 USD (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,992 USD 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
Color
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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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $6,992 USD|Low: $3,432 USD|High: $8,529 USD|Avg: $4,944 USD|-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$3,432 USD
Retailer 9$3,488 USD
Retailer 3$3,594 USD
Retailer 4$3,920 USD
Retailer 6$3,993 USD
Retailer 11$3,993 USD
Retailer 2$4,145 USD
Retailer 12$4,150 USD
Retailer 14$4,150 USD
Retailer 13$4,290 USD
Retailer 7$4,465 USD
Retailer 10$5,856 USD
Retailer 8$6,711 USD
NZ Jewellers$6,992 USD

39 data points across 14 retailers

15 retailers$3,432 USD to $6,711 USD

B+
Cheapest Retailer
-
$3,432 USD
B+
Retailer 2
-
$3,488 USD
View
B+
Retailer 3
-
$3,594 USD
View
Retailer 4
-
$3,920 USD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
$3,993 USD
View
B+
Retailer 6
-
$3,993 USD
View
B+
Retailer 7
-
$4,145 USD
View
Retailer 8
-
$4,150 USD
View
Price last confirmed 8 days ago
Retailer 9
-
$4,150 USD
View
Price last confirmed 8 days ago
Retailer 10
-
$4,290 USD
View
Price last confirmed 8 days ago
B+
Retailer 11
-
$4,465 USD
View
B
Retailer 12
-
$5,035 USD
View
Retailer 13
-
$5,856 USD
View
Price last confirmed 11 days ago
B
Retailer 14
-
$6,711 USD
View
Most Expensive
NZ Jewellers
35a80dc2-e68c-4c01-970b-8ebe5c41a2e5 · Oct 30
$6,992 USD
View
Price last confirmed 7 days ago
14 more retailers have this diamond
Prices start from $3,432 USDSave up to $3,279 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.

B+
1.21ct Radiant
$3,432 USD