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Round|Natural|GIA

1.21ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6495819176

Certificate GIA 6495819176

Diamond specifications and retailer prices

From $3,487 AUD
As of November 4, 2026
Save $4,413 AUD (56%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $7,900 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6495819176. Listed at 15 retailers as of November 4, 2026, with prices from $3,487 to $7,900, a $4,413 spread on the same certified stone. NZ Jewellers lists it at $7,900. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6495819176
Dimensions6.79 × 6.77 × 4.22 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.79 mm6.77 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6495819176
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $7,900 AUD|Low: $3,051 AUD|High: $7,900 AUD|Avg: $4,575 AUD|+4.8%
NZ Jewellers
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
November 6, 2026
Retailer 6$3,289 AUD
Retailer 4$3,487 AUD
Retailer 2$3,566 AUD
Retailer 14$3,639 AUD
Retailer 13$3,778 AUD
Retailer 16$3,778 AUD
Retailer 3$3,953 AUD
Retailer 9$3,975 AUD
Retailer 7$4,197 AUD
Retailer 5$4,260 AUD
Retailer 15$4,360 AUD
Retailer 11$4,612 AUD
Retailer 10$4,682 AUD
Retailer 8$6,546 AUD
Retailer 12$6,621 AUD
NZ Jewellers$7,900 AUD

35 data points across 16 retailers

15 retailers$3,487 AUD to $7,900 AUD

B+
Cheapest Retailer
-
$3,487 AUD
Final sale: no returns
B+
Retailer 2
-
$3,566 AUD
View
B+
Retailer 3
-
$3,639 AUD
View
B+
Retailer 4
-
$3,778 AUD
View
Retailer 5
-
$3,778 AUD
View
Price last confirmed 9 days ago
B+
Retailer 6
-
$3,953 AUD
View
B+
Retailer 7
-
$3,975 AUD
View
Retailer 8
-
$4,197 AUD
View
Price last confirmed 26 days ago
Retailer 9
-
$4,260 AUD
View
Price last confirmed 26 days ago
B+
Retailer 10
-
$4,360 AUD
View
B+
Retailer 11
-
$4,612 AUD
View
B
Retailer 12
-
$4,682 AUD
View
Retailer 13
-
$6,546 AUD
View
Price last confirmed 26 days ago
B
Retailer 14
-
$6,621 AUD
View
Most Expensive
B
NZ Jewellers
6f08d3b7-6352-41ba-bfd4-e59c6e82067d · Nov 5
$7,900 AUD
$5,428 USD
View
14 more retailers have this diamond
Prices start from $3,487 AUDSave up to $4,413 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.

B+
1.21ct Round
$3,487 AUD