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Round|Natural|IGI

1.29ct J SI2 Round Natural Diamond

EX • J/SI2 • IGI 678518039

Shape and cutting style on the report: Round brilliant

Certificate IGI 678518039

Diamond specifications and retailer prices

From $1,605 NZD
As of November 6, 2026
Save $2,183 NZD (58%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $5,060 NZD at NZ Jewellers · As of September 26, 2026
View at NZ Jewellers

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 678518039. Listed at 15 retailers as of November 4, 2026, with a 136% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41.3°
OriginNatural
Grading LabIGI
CertificateIGI 678518039
Dimensions6.90 × 6.86 × 4.36 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.90 mm6.86 mm1.29 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 678518039
Side View
Table 59.0%Crown 36°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 63.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $1,605 NZD|Low: $1,605 NZD|High: $3,846 NZD|Avg: $2,465 NZD|-3.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 1$1,605 NZD
Retailer 2$1,984 NZD
Retailer 5$1,988 NZD
Retailer 3$2,886 NZD
Retailer 4$3,788 NZD

41 data points across 5 retailers

15 retailers$1,605 NZD to $3,788 NZD

A
Cheapest Retailer
-
$1,605 NZD
Retailer 2
-
$1,973 NZD
View
Price last confirmed 95 days ago
A
Retailer 3
-
$1,984 NZD
View
A
Retailer 4
-
$1,988 NZD
View
Retailer 5
-
$2,074 NZD
View
Price last confirmed 50 days ago
Retailer 6
-
$2,074 NZD
View
Price last confirmed 29 days ago
Retailer 7
-
$2,074 NZD
View
Price last confirmed 29 days ago
Retailer 8
-
$2,154 NZD
View
Price last confirmed 38 days ago
A
Retailer 9
-
$2,316 NZD
View
Retailer 10
-
$2,394 NZD
View
Price last confirmed 45 days ago
Retailer 11
-
$2,394 NZD
View
Price last confirmed 28 days ago
A
Retailer 12
-
$2,886 NZD
View
A
Retailer 13
-
$3,788 NZD
View
Retailer 14
-
$5,060 NZD
View
Price last confirmed 46 days ago
Most Expensive
NZ Jewellers
3888afb2-bcee-4462-95a8-39e6533ce625 · Sep 26
$5,060 NZD
$2,805 USD
View
Price last confirmed 40 days ago
14 more retailers have this diamond
Prices start from $1,605 NZDSave up to $2,183 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
$1,605 NZD