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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 $3,930 NZD
SGD 2,988 SGD
As of October 31, 2026
Save $3,412 NZD (46%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $7,342 NZD 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 $3,930 to $7,342, a $3,412 spread on the same certified stone. Helzberg Diamonds lists it at $7,342. 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: $7,342 NZD|Low: $3,930 NZD|High: $7,342 NZD|Avg: $5,115 NZD
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 14$3,930 NZD
Retailer 2$4,141 NZD
Retailer 6$4,150 NZD
Retailer 15$4,196 NZD
Retailer 16$4,266 NZD
Retailer 4$4,268 NZD
Retailer 9$4,582 NZD
Retailer 8$4,648 NZD
Retailer 3$5,024 NZD
Retailer 7$5,251 NZD
Retailer 11$5,353 NZD
Retailer 13$5,440 NZD
Retailer 10$5,481 NZD
Retailer 5$6,507 NZD
Retailer 12$6,951 NZD
Helzberg Diamonds$7,342 NZD

34 data points across 16 retailers

16 retailers$3,930 NZD to $7,342 NZD

A
Cheapest Retailer
-
$3,930 NZD
SGD 2,988 SGD
A
Retailer 2
-
$4,141 NZD
$2,330 USD
View
A
Retailer 3
-
$4,150 NZD
$2,335 USD
View
A
Retailer 4
-
$4,196 NZD
$2,361 USD
View
A
Retailer 5
-
$4,266 NZD
$2,400 USD
View
A
Retailer 6
-
$4,268 NZD
$2,402 USD
View
B+
Retailer 7
-
$4,582 NZD
£2,030 GBP
View
B+
Retailer 8
-
$4,648 NZD
SGD 3,534 SGD
View
B+
Retailer 9
-
$5,024 NZD
$2,827 USD
View
B+
Retailer 10
-
$5,251 NZD
$2,954 USD
View
B+
Retailer 11
-
$5,353 NZD
$3,012 USD
View
B+
Retailer 12
-
$5,440 NZD
£2,410 GBP
View
B+
Retailer 13
-
$5,481 NZD
€2,937 EUR
View
B
Retailer 14
-
$6,507 NZD
$3,661 USD
View
B
Retailer 15
-
$6,951 NZD
$3,911 USD
View
Most Expensive
B
Helzberg Diamonds
XZRLIKHGOJOLO · Nov 2
$7,342 NZD
$4,131 USD
View
15 more retailers have this diamond
Prices start from $3,930 NZDSave up to $3,412 NZD

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
$3,930 NZD