CaratHunter
Plans
Round|Natural|GIA

1.21ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 5423150018

Certificate GIA 5423150018

Diamond specifications and retailer prices

From $2,959 AUD
As of November 6, 2026
Save $4,733 AUD (62%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $7,692 AUD 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 $2,959 to $7,692, a $4,733 spread on the same certified stone. NZ Jewellers lists it at $7,692. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $7,692 AUD|Low: $2,959 AUD|High: $7,692 AUD|Avg: $4,948 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 5$2,959 AUD
Retailer 6$3,487 AUD
Retailer 2$3,908 AUD
Retailer 3$4,577 AUD
Retailer 4$6,479 AUD
NZ Jewellers$7,692 AUD

42 data points across 6 retailers

9 retailers$2,959 AUD to $7,692 AUD

A
Cheapest Retailer
-
$2,959 AUD
B+
Retailer 2
-
$3,333 AUD
View
B+
Retailer 3
-
$3,487 AUD
View
B
Retailer 4
-
$3,847 AUD
View
B+
Retailer 5
-
$3,908 AUD
View
B
Retailer 6
-
$4,577 AUD
View
B
Retailer 7
-
$5,347 AUD
View
Retailer 8
-
$6,479 AUD
View
Price last confirmed 8 days ago
Most Expensive
C
NZ Jewellers
6d102739-0765-4f66-bfa8-7da1dfd07ccb · Nov 5
$7,692 AUD
$5,285 USD
View
8 more retailers have this diamond
Prices start from $2,959 AUDSave up to $4,733 AUD

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
$2,959 AUD