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Round|Natural|HRD

1.21ct F SI2 Round Natural Diamond

EX • F/SI2 • HRD 240000199388

Certificate HRD 240000199388

Diamond specifications and retailer prices

From $2,901 AUD
As of November 4, 2026
Save $3,812 AUD (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,712 AUD at NZ Jewellers · As of November 2, 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 F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by HRD 240000199388. Listed at 14 retailers as of November 2, 2026, with prices from $2,901 to $6,712, a $3,812 spread on the same certified stone. NZ Jewellers lists it at $6,712. 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
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle35.2°
Pavilion angle41.4°
OriginNatural
Grading LabHRD
CertificateHRD 240000199388
Dimensions6.75 × 6.71 × 4.27 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
The stone in accordance with the mentioned number has been identified as a natural gem diamond.
Top View
6.75 mm6.71 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateHRD 240000199388
Side View
Table 58.0%Crown 35.2°Girdle: MediumPavilion 41.4°Culet: NoneDepth 63.4%

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 4
Current: $6,712 AUD|Low: $2,716 AUD|High: $6,712 AUD|Avg: $3,874 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 4$2,901 AUD
Retailer 5$2,962 AUD
Retailer 7$3,058 AUD
Retailer 8$3,211 AUD
Retailer 10$3,211 AUD
Retailer 6$3,359 AUD
Retailer 9$3,704 AUD
Retailer 2$4,001 AUD
Retailer 3$5,609 AUD
NZ Jewellers$6,712 AUD

27 data points across 10 retailers

14 retailers$2,901 AUD to $6,712 AUD

A
Cheapest Retailer
-
$2,901 AUD
A
Retailer 2
-
$2,962 AUD
View
Final sale: no returns
A
Retailer 3
-
$3,058 AUD
View
Retailer 4
-
$3,211 AUD
View
Price last confirmed 54 days ago
Retailer 5
-
$3,211 AUD
View
Price last confirmed 26 days ago
A
Retailer 6
-
$3,211 AUD
View
A
Retailer 7
-
$3,359 AUD
View
Retailer 8
-
$3,704 AUD
View
Price last confirmed 54 days ago
A
Retailer 9
-
$3,704 AUD
View
A
Retailer 10
-
$4,001 AUD
View
B+
Retailer 11
-
$5,609 AUD
View
B
Retailer 12
-
$6,303 AUD
View
Retailer 13
-
$6,712 AUD
View
Price last confirmed 53 days ago
Most Expensive
B
NZ Jewellers
3400ff51-b38b-445a-a925-c9e3f6b5b1aa · Nov 2
$6,712 AUD
$4,612 USD
View
13 more retailers have this diamond
Prices start from $2,901 AUDSave up to $3,812 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
$2,901 AUD