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Round|Natural|GIA

1.29ct J SI1 Round Natural Diamond

ID • J/SI1 • GIA 19

Certificate GIA 19

Diamond specifications and retailer prices

From $4,178 AUD
$2,935 USD
As of November 1, 2026
Save $979 AUD (19%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $5,158 AUD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 1.29ct natural round diamond

This 1.29ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 2 retailers as of October 31, 2026, with prices from $4,178 to $5,158, a $979 spread on the same certified stone. Blue Nile lists it at $5,158. 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

1.29
Carat
J
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 19
Dimensions6.99 × 7.03 × 4.24 mm
L/W Ratio1.01
Top View
6.99 mm7.03 mm1.29 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 19
Side View
Table 59.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 60.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 1
Current: $5,158 AUD|Low: $2,857 AUD|High: $5,158 AUD|Avg: $4,042 AUD
Blue Nile
Retailer 2
Retailer 3
November 1, 2026
Retailer 3$2,857 AUD
Retailer 2$4,178 AUD
Blue Nile$5,158 AUD

2 data points across 3 retailers

2 retailers$4,178 AUD to $5,158 AUD

B+
Cheapest Retailer
-
$4,178 AUD
$2,935 USD
Most Expensive
B
Blue Nile
30515000 · Oct 31
$5,158 AUD
$3,623 USD
View
1 more retailer has this diamond
Prices start from $4,178 AUDSave up to $979 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+
1.29ct Round
$4,178 AUD