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Radiant|Natural|GIA

1.21ct E SI1 Radiant Natural Diamond

EX • E/SI1 • GIA 2518450103

Certificate GIA 2518450103

Diamond specifications and retailer prices

From $6,945 NZD
As of November 6, 2026
Save $7,340 NZD (51%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $14,285 NZD at NZ Jewellers · As of November 5, 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 E 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 2518450103. Listed at 14 retailers as of November 5, 2026, with prices from $6,945 to $14,285, a $7,340 spread on the same certified stone. NZ Jewellers lists it at $14,285. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.29°
Pavilion angle30.5°
OriginNatural
Grading LabGIA
CertificateGIA 2518450103
Dimensions6.67 × 5.23 × 3.64 mm
L/W Ratio1.28
Top View
6.67 mm5.23 mm1.21 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2518450103
Side View
Table 65.0%Crown 44.29°Girdle: THK-VTKPavilion 30.5°Culet: NoneDepth 69.7%

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 6
Current: $14,285 NZD|Low: $6,945 NZD|High: $14,776 NZD|Avg: $9,531 NZD|-3.3%
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 7, 2026
Retailer 5$6,945 NZD
Retailer 10$7,079 NZD
Retailer 4$7,349 NZD
Retailer 12$7,621 NZD
Retailer 2$8,150 NZD
Retailer 6$8,166 NZD
Retailer 3$8,442 NZD
Retailer 13$8,442 NZD
Retailer 7$8,709 NZD
Retailer 14$8,731 NZD
Retailer 8$8,808 NZD
Retailer 11$11,976 NZD
Retailer 9$13,022 NZD
NZ Jewellers$14,285 NZD

43 data points across 14 retailers

14 retailers$6,945 NZD to $14,285 NZD

B+
Cheapest Retailer
-
$6,945 NZD
B+
Retailer 2
-
$7,079 NZD
View
B+
Retailer 3
-
$7,349 NZD
View
B+
Retailer 4
-
$7,621 NZD
View
B+
Retailer 5
-
$8,150 NZD
View
B+
Retailer 6
-
$8,166 NZD
View
B+
Retailer 7
-
$8,442 NZD
View
B+
Retailer 8
-
$8,442 NZD
View
B
Retailer 9
-
$8,709 NZD
View
B
Retailer 10
-
$8,731 NZD
View
B+
Retailer 11
-
$8,808 NZD
View
B
Retailer 12
-
$11,976 NZD
View
B
Retailer 13
-
$13,022 NZD
View
Most Expensive
B
NZ Jewellers
c41f34da-ef32-4739-bab4-64ae197ec1fe · Nov 5
$14,285 NZD
$7,919 USD
View
13 more retailers have this diamond
Prices start from $6,945 NZDSave up to $7,340 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
$6,945 NZD