Round|Natural|GIA

1.29ct J SI1 Round Natural Diamond

ID • J/SI1 • GIA 19

Certificate GIA 19

Diamond specifications and retailer prices

From $2,935 USD
As of November 1, 2026
Save $688 USD (19%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $3,623 USD 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 $2,935 to $3,623, a $688 spread on the same certified stone. Blue Nile lists it at $3,623. 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
Color
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: $3,623 USD|Low: $2,007 USD|High: $3,623 USD|Avg: $2,839 USD
Blue Nile
Retailer 2
Retailer 3
November 1, 2026
Retailer 3$2,007 USD
Retailer 2$2,935 USD
Blue Nile$3,623 USD

2 data points across 3 retailers

2 retailers$2,935 USD to $3,623 USD

B+
Cheapest Retailer
-
$2,935 USD
Most Expensive
B
Blue Nile
30515000 · Oct 31
$3,623 USD
View
1 more retailer has this diamond
Prices start from $2,935 USDSave up to $688 USD

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
$2,935 USD