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Round|Natural|GIA

1.28ct J SI2 Round Natural Diamond

GD • J/SI2 • GIA 2231291639

Certificate GIA 2231291639

Diamond specifications and retailer prices

From $4,323 AUD
$3,037 USD
As of October 31, 2026
Save $1,647 AUD (28%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $5,970 AUD at Yorxs · As of October 30, 2026
View at Yorxs

About this 1.28ct natural round diamond

This 1.28ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade and certified by GIA 2231291639. Listed at 3 retailers as of October 30, 2026, with prices from $4,323 to $5,970, a $1,647 spread on the same certified stone. Yorxs lists it at $5,970. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.28
Carat
J
Colour
SI2
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2231291639
Dimensions7.19 × 7.28 × 4.11 mm
L/W Ratio1.01
Top View
7.19 mm7.28 mm1.28 ctJ / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2231291639
Side View
Table 62.0%CrownGirdle: THN-MEDPavilionCulet: NoneDepth 56.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: $4,323 AUD|Low: $4,323 AUD|High: $5,970 AUD|Avg: $5,125 AUD|-6.5%
Retailer 1
Yorxs
October 30, 2026
Retailer 1$4,323 AUD
Yorxs$5,970 AUD

15 data points across 2 retailers

3 retailers$4,323 AUD to $5,970 AUD

B
Cheapest Retailer
-
$4,323 AUD
$3,037 USD
B
Retailer 2
-
$4,507 AUD
View
Most Expensive
C
Yorxs
JOLA2147 · Oct 30
$5,970 AUD
€3,994 EUR
View
2 more retailers have this diamond
Prices start from $4,323 AUDSave up to $1,647 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
1.28ct Round
$4,323 AUD