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Round|Natural|GIA

1.21ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 1568139211

Certificate GIA 1568139211

Diamond specifications and retailer prices

From $3,219 AUD
$2,261 USD
As of October 31, 2026
Save $1,366 AUD (30%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,721 AUD at NZ Jewellers · As of October 3, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1568139211. Listed at 13 retailers as of October 31, 2026, with a 42% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1568139211
Dimensions6.79 × 6.75 × 4.25 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
6.79 mm6.75 mm1.21 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1568139211
Side View
Table 58.0%Crown 35°Girdle: Slightly ThickPavilion 41.4°Culet: NDepth 62.8%

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: Oct 31
Current: $4,584 AUD|Low: $2,730 AUD|High: $5,701 AUD|Avg: $3,541 AUD|+16.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 8$3,018 AUD
Retailer 6$3,219 AUD
Retailer 10$3,233 AUD
Retailer 2$3,274 AUD
Retailer 5$3,437 AUD
Retailer 3$3,784 AUD
Retailer 7$4,086 AUD
Retailer 4$4,180 AUD
Retailer 1$4,584 AUD
Retailer 9$5,294 AUD

33 data points across 10 retailers

13 retailers$3,219 AUD to $4,584 AUD

Retailer 1
-
$3,018 AUD
$2,120 USD
Price last confirmed 9 days ago
Retailer 2
-
$3,214 AUD
$2,258 USD
View
Price last confirmed 29 days ago
B+
Retailer 3
-
$3,219 AUD
$2,261 USD
View
Retailer 4
-
$3,233 AUD
$2,271 USD
View
Price last confirmed 13 days ago
Retailer 5
-
$3,300 AUD
$2,318 USD
View
Price last confirmed 33 days ago
B+
Retailer 6
-
$3,437 AUD
$2,414 USD
View
Retailer 7
-
$3,710 AUD
$2,606 USD
View
Price last confirmed 28 days ago
B
Retailer 8
-
$3,784 AUD
£2,093 GBP
View
B
Retailer 9
-
$4,086 AUD
$2,870 USD
View
B
Retailer 10
-
$4,180 AUD
£2,312 GBP
View
B
Retailer 11
-
$4,584 AUD
€3,067 EUR
View
Retailer 12
-
$5,294 AUD
£2,928 GBP
View
Price last confirmed 11 days ago
Most Expensive
NZ Jewellers
a97379d0-ccd1-40c8-a18a-99acab17243b · Oct 3
$6,721 AUD
$4,721 USD
View
Price last confirmed 29 days ago
12 more retailers have this diamond
Prices start from $3,219 AUDSave up to $1,366 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
$3,219 AUD