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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 $1,137 SGD
As of November 6, 2026
Save $1,546 SGD (58%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,583 SGD 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: $1,137 SGD|Low: $1,137 SGD|High: $2,723 SGD|Avg: $1,746 SGD|-3.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 1$1,137 SGD
Retailer 2$1,405 SGD
Retailer 5$1,408 SGD
Retailer 3$2,044 SGD
Retailer 4$2,682 SGD

41 data points across 5 retailers

15 retailers$1,137 SGD to $2,682 SGD

A
Cheapest Retailer
-
$1,137 SGD
Retailer 2
-
$1,397 SGD
View
Price last confirmed 95 days ago
A
Retailer 3
-
$1,405 SGD
View
A
Retailer 4
-
$1,408 SGD
View
Retailer 5
-
$1,469 SGD
View
Price last confirmed 50 days ago
Retailer 6
-
$1,469 SGD
View
Price last confirmed 29 days ago
Retailer 7
-
$1,469 SGD
View
Price last confirmed 29 days ago
Retailer 8
-
$1,525 SGD
View
Price last confirmed 38 days ago
A
Retailer 9
-
$1,640 SGD
View
Retailer 10
-
$1,695 SGD
View
Price last confirmed 45 days ago
Retailer 11
-
$1,695 SGD
View
Price last confirmed 28 days ago
A
Retailer 12
-
$2,044 SGD
View
A
Retailer 13
-
$2,682 SGD
View
Retailer 14
-
$3,583 SGD
View
Price last confirmed 46 days ago
Most Expensive
NZ Jewellers
3888afb2-bcee-4462-95a8-39e6533ce625 · Sep 26
$3,583 SGD
$2,805 USD
View
Price last confirmed 40 days ago
14 more retailers have this diamond
Prices start from $1,137 SGDSave up to $1,546 SGD

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
$1,137 SGD