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Radiant|Natural|GIA

1.21ct I SI2 Radiant Natural Diamond

EX • I/SI2 • GIA 2556128158

Certificate GIA 2556128158

Diamond specifications and retailer prices

From $4,465 NZD
As of November 7, 2026
5 retailers carry this diamond
Most expensive: $9,570 NZD at NZ Jewellers · As of September 25, 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 2556128158. Listed at 5 retailers as of November 7, 2026. 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
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2556128158
Dimensions7.11 × 5.26 × 3.57 mm
L/W Ratio1.35
Top View
7.11 mm5.26 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2556128158
Side View
Table 66.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.9%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 7
Current: $4,322 NZD|Low: $3,370 NZD|High: $8,345 NZD|Avg: $4,866 NZD|-0.3%
Retailer 1
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
Retailer 15
Retailer 16
Retailer 17
October 6, 2026
Retailer 10$3,370 NZD
Retailer 17$3,431 NZD
Retailer 11$3,454 NZD
Retailer 12$3,711 NZD
Retailer 4$4,026 NZD
Retailer 13$4,221 NZD
Retailer 15$4,261 NZD
Retailer 1$4,322 NZD
Retailer 5$4,465 NZD
Retailer 7$4,690 NZD
Retailer 8$4,690 NZD
Retailer 9$4,852 NZD
Retailer 2$5,588 NZD
Retailer 6$5,724 NZD
Retailer 14$6,422 NZD
Retailer 3$6,923 NZD
Retailer 16$7,989 NZD

12 data points across 17 retailers

5 retailers

Retailer 1
-
$3,370 NZD
Price last confirmed 33 days ago
Retailer 2
-
$4,221 NZD
View
Price last confirmed 34 days ago
B+
Retailer 3
-
$4,465 NZD
View
Retailer 4
-
$7,989 NZD
View
Price last confirmed 33 days ago
Most Expensive
NZ Jewellers
43dc02b9-5f31-4cb3-aa5c-7ce9f778202a · Sep 25
$9,570 NZD
$5,305 USD
View
Price last confirmed 42 days ago
4 more retailers have this diamond
Prices start from $4,465 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
$4,465 NZD