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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 $6,191 NZD
As of November 2, 2026
Save $5,915 NZD (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $12,613 NZD 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $12,613 NZD|Low: $6,191 NZD|High: $15,385 NZD|Avg: $8,918 NZD|-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$6,191 NZD
Retailer 9$6,292 NZD
Retailer 3$6,483 NZD
Retailer 4$7,071 NZD
Retailer 6$7,203 NZD
Retailer 11$7,203 NZD
Retailer 2$7,477 NZD
Retailer 12$7,486 NZD
Retailer 14$7,486 NZD
Retailer 13$7,739 NZD
Retailer 7$8,054 NZD
Retailer 10$10,564 NZD
Retailer 8$12,106 NZD
NZ Jewellers$12,613 NZD

39 data points across 14 retailers

15 retailers$6,191 NZD to $12,106 NZD

B+
Cheapest Retailer
-
$6,191 NZD
B+
Retailer 2
-
$6,292 NZD
View
B+
Retailer 3
-
$6,483 NZD
View
Retailer 4
-
$7,071 NZD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
$7,203 NZD
View
B+
Retailer 6
-
$7,203 NZD
View
B+
Retailer 7
-
$7,477 NZD
View
Retailer 8
-
$7,486 NZD
View
Price last confirmed 8 days ago
Retailer 9
-
$7,486 NZD
View
Price last confirmed 8 days ago
Retailer 10
-
$7,739 NZD
View
Price last confirmed 8 days ago
B+
Retailer 11
-
$8,054 NZD
View
B
Retailer 12
-
$9,083 NZD
View
Retailer 13
-
$10,564 NZD
View
Price last confirmed 11 days ago
B
Retailer 14
-
$12,106 NZD
View
Most Expensive
NZ Jewellers
35a80dc2-e68c-4c01-970b-8ebe5c41a2e5 · Oct 30
$12,613 NZD
$6,992 USD
View
Price last confirmed 7 days ago
14 more retailers have this diamond
Prices start from $6,191 NZDSave up to $5,915 NZD

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
$6,191 NZD