Round|Natural|GIA

1.21ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 1559331104

Certificate GIA 1559331104

Diamond specifications and retailer prices

From $3,284 AUD

$2,307 USD

As of November 2, 2026

Save $2,046 AUD (38%) vs most expensive(unlock to see where)

12 retailers carry this diamond

Most expensive: $5,330 AUD at Yorxs · As of November 1, 2026

View at Yorxs

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 1559331104. Listed at 12 retailers as of November 1, 2026, with prices from $3,284 to $5,330, a $2,046 spread on the same certified stone. Yorxs lists it at $5,330. 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

Colour

SI2

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle36.5°

Pavilion angle41°

OriginNatural

Grading LabGIA

CertificateGIA 1559331104

Dimensions6.77 × 6.80 × 4.26 mm

L/W Ratio1.00

Culet sizeNone

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 1559331104

Side View

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 2

Current: $3,291 AUD|Low: $2,499 AUD|High: $5,330 AUD|Avg: $3,243 AUD|-5.2%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Yorxs

November 1, 2026

Retailer 12$2,499 AUD

Retailer 3$2,541 AUD

Retailer 11$2,563 AUD

Retailer 9$2,701 AUD

Retailer 10$2,720 AUD

Retailer 8$2,736 AUD

Retailer 5$3,007 AUD

Retailer 7$3,260 AUD

Retailer 4$3,280 AUD

Retailer 1$3,291 AUD

Retailer 2$4,192 AUD

Retailer 6$4,501 AUD

Yorxs$5,330 AUD

34 data points across 13 retailers

12 retailers$3,284 AUD to $5,330 AUD

Retailer 1

$2,499 AUD

SGD 2,372 SGD

Price last confirmed 11 days ago

Retailer 2

$2,541 AUD

$1,785 USD

View

Price last confirmed 13 days ago

Retailer 3

$2,563 AUD

$1,801 USD

View

Price last confirmed 16 days ago

Retailer 4

$2,701 AUD

£1,494 GBP

View

Price last confirmed 13 days ago

Retailer 5

$2,720 AUD

$1,911 USD

View

Price last confirmed 13 days ago

Retailer 6

$2,736 AUD

SGD 2,597 SGD

View

Price last confirmed 13 days ago

Retailer 7

$3,007 AUD

$2,112 USD

View

Price last confirmed 13 days ago

B+

Retailer 8

$3,284 AUD

$2,307 USD

View

Retailer 9

$3,291 AUD

£1,820 GBP

View

Price last confirmed 12 days ago

Retailer 10

$4,192 AUD

$2,944 USD

View

Price last confirmed 13 days ago

Retailer 11

$4,501 AUD

$3,162 USD

View

Price last confirmed 13 days ago

Most Expensive

Yorxs

E25410B · Nov 1

$5,330 AUD

€3,566 EUR

View

11 more retailers have this diamond

Prices start from $3,284 AUDSave up to $2,046 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.

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1.21ct Round

$3,284 AUD