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Radiant|Natural|GIA

1.21ct J SI2 Radiant Natural Diamond

EX • J/SI2 • GIA 1555663793

Certificate GIA 1555663793

Diamond specifications and retailer prices

From $3,018 NZD
$1,698 USD
As of October 28, 2026
Save $2,390 NZD (44%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $5,408 NZD at Helzberg Diamonds · As of October 28, 2026
View at Helzberg Diamonds

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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555663793. Listed at 10 retailers as of October 28, 2026, with prices from $3,018 to $5,408, a $2,390 spread on the same certified stone. Helzberg Diamonds lists it at $5,408. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1555663793
Dimensions7.41 × 5.28 × 3.45 mm
L/W Ratio1.40
Culet sizeNone
Top View
7.41 mm5.28 mm1.21 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1555663793
Side View
Table 68.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 65.4%

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: Oct 28
Current: $5,408 NZD|Low: $3,018 NZD|High: $5,862 NZD|Avg: $4,179 NZD|-7.7%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 4$3,018 NZD
Retailer 5$3,018 NZD
Retailer 9$3,285 NZD
Retailer 6$3,317 NZD
Retailer 7$3,620 NZD
Retailer 3$3,786 NZD
Retailer 8$3,947 NZD
Retailer 2$4,251 NZD
Retailer 10$4,968 NZD
Helzberg Diamonds$5,408 NZD

37 data points across 10 retailers

10 retailers$3,018 NZD to $5,408 NZD

A
Cheapest Retailer
-
$3,018 NZD
$1,698 USD
A
Retailer 2
-
$3,018 NZD
$1,698 USD
View
A
Retailer 3
-
$3,285 NZD
SGD 2,498 SGD
View
A
Retailer 4
-
$3,317 NZD
£1,469 GBP
View
B+
Retailer 5
-
$3,620 NZD
$2,037 USD
View
B+
Retailer 6
-
$3,786 NZD
$2,130 USD
View
B+
Retailer 7
-
$3,947 NZD
$2,221 USD
View
B+
Retailer 8
-
$4,251 NZD
€2,278 EUR
View
B+
Retailer 9
-
$4,968 NZD
$2,795 USD
View
Most Expensive
B
Helzberg Diamonds
XZRHLLLMMJNPJ · Oct 28
$5,408 NZD
$3,043 USD
View
9 more retailers have this diamond
Prices start from $3,018 NZDSave up to $2,390 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.

A
1.21ct Radiant
$3,018 NZD