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Round|Natural|GIA

1.29ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 5241083858

Certificate GIA 5241083858

Diamond specifications and retailer prices

From $3,148 AUD
SGD 2,988 SGD
As of October 31, 2026
Save $2,733 AUD (46%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $5,881 AUD at Helzberg Diamonds · As of November 2, 2026
View at Helzberg Diamonds

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 5241083858. Listed at 16 retailers as of October 31, 2026, with prices from $3,148 to $5,881, a $2,733 spread on the same certified stone. Helzberg Diamonds lists it at $5,881. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle34.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 5241083858
Dimensions6.94 × 6.97 × 4.33 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.94 mm6.97 mm1.29 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5241083858
Side View
Table 58.0%Crown 34.5°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $5,881 AUD|Low: $3,148 AUD|High: $5,881 AUD|Avg: $4,097 AUD
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 2, 2026
Retailer 13$3,148 AUD
Retailer 8$3,296 AUD
Retailer 5$3,324 AUD
Retailer 14$3,361 AUD
Retailer 15$3,417 AUD
Retailer 3$3,419 AUD
Retailer 2$3,670 AUD
Retailer 7$3,723 AUD
Retailer 16$4,025 AUD
Retailer 6$4,206 AUD
Retailer 10$4,288 AUD
Retailer 12$4,357 AUD
Retailer 9$4,390 AUD
Retailer 4$5,212 AUD
Retailer 11$5,567 AUD
Helzberg Diamonds$5,881 AUD

34 data points across 16 retailers

16 retailers$3,148 AUD to $5,881 AUD

A
Cheapest Retailer
-
$3,148 AUD
SGD 2,988 SGD
A
Retailer 2
-
$3,296 AUD
$2,315 USD
View
A
Retailer 3
-
$3,324 AUD
$2,335 USD
View
A
Retailer 4
-
$3,361 AUD
$2,361 USD
View
A
Retailer 5
-
$3,417 AUD
$2,400 USD
View
A
Retailer 6
-
$3,419 AUD
$2,402 USD
View
B+
Retailer 7
-
$3,670 AUD
£2,030 GBP
View
B+
Retailer 8
-
$3,723 AUD
SGD 3,534 SGD
View
B+
Retailer 9
-
$4,025 AUD
$2,827 USD
View
B+
Retailer 10
-
$4,206 AUD
$2,954 USD
View
B+
Retailer 11
-
$4,288 AUD
$3,012 USD
View
B+
Retailer 12
-
$4,357 AUD
£2,410 GBP
View
B+
Retailer 13
-
$4,390 AUD
€2,937 EUR
View
B
Retailer 14
-
$5,212 AUD
$3,661 USD
View
B
Retailer 15
-
$5,567 AUD
$3,911 USD
View
Most Expensive
B
Helzberg Diamonds
XZRLIKHGOJOLO · Nov 2
$5,881 AUD
$4,131 USD
View
15 more retailers have this diamond
Prices start from $3,148 AUDSave up to $2,733 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.

A
1.29ct Round
$3,148 AUD