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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 $2,597 SGD
As of November 6, 2026
Save $4,154 SGD (62%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $6,751 SGD 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 $2,597 to $6,751, a $4,154 spread on the same certified stone. NZ Jewellers lists it at $6,751. 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: $6,751 SGD|Low: $2,597 SGD|High: $6,751 SGD|Avg: $4,342 SGD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 5$2,597 SGD
Retailer 6$3,060 SGD
Retailer 2$3,430 SGD
Retailer 3$4,017 SGD
Retailer 4$5,687 SGD
NZ Jewellers$6,751 SGD

42 data points across 6 retailers

9 retailers$2,597 SGD to $6,751 SGD

A
Cheapest Retailer
-
$2,597 SGD
B+
Retailer 2
-
$2,925 SGD
View
B+
Retailer 3
-
$3,060 SGD
View
B
Retailer 4
-
$3,376 SGD
View
B+
Retailer 5
-
$3,430 SGD
View
B
Retailer 6
-
$4,017 SGD
View
B
Retailer 7
-
$4,693 SGD
View
Retailer 8
-
$5,687 SGD
View
Price last confirmed 8 days ago
Most Expensive
C
NZ Jewellers
6d102739-0765-4f66-bfa8-7da1dfd07ccb · Nov 5
$6,751 SGD
$5,285 USD
View
8 more retailers have this diamond
Prices start from $2,597 SGDSave up to $4,154 SGD

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
$2,597 SGD