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Round|Natural|GIA

1.21ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 5423150018

Certificate GIA 5423150018

Diamond specifications and retailer prices

From $3,667 NZD
As of November 6, 2026
Save $5,866 NZD (62%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $9,534 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5423150018. Listed at 9 retailers as of November 5, 2026, with prices from $3,667 to $9,534, a $5,866 spread on the same certified stone. NZ Jewellers lists it at $9,534. 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
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5423150018
Dimensions6.83 × 6.79 × 4.26 mm
L/W Ratio1.01
Top View
6.83 mm6.79 mm1.21 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5423150018
Side View
Table 55.0%Crown 35.5°GirdlePavilion 41°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,684 NZD|Low: $3,667 NZD|High: $8,087 NZD|Avg: $5,404 NZD|+2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 4$3,667 NZD
Retailer 5$4,322 NZD
Retailer 2$4,843 NZD
Retailer 1$5,684 NZD
Retailer 3$8,031 NZD

42 data points across 5 retailers

9 retailers$3,667 NZD to $9,534 NZD

A
Cheapest Retailer
-
$3,667 NZD
B+
Retailer 2
-
$4,131 NZD
View
B+
Retailer 3
-
$4,322 NZD
View
B
Retailer 4
-
$4,768 NZD
View
B+
Retailer 5
-
$4,843 NZD
View
B
Retailer 6
-
$5,684 NZD
View
B
Retailer 7
-
$6,628 NZD
View
Retailer 8
-
$8,031 NZD
View
Price last confirmed 8 days ago
Most Expensive
C
NZ Jewellers
6d102739-0765-4f66-bfa8-7da1dfd07ccb · Nov 5
$9,534 NZD
$5,285 USD
View
8 more retailers have this diamond
Prices start from $3,667 NZDSave up to $5,866 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 Round
$3,667 NZD