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1.29ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 629464478

Shape and cutting style on the report: Round brilliant

Certificate IGI 629464478

Diamond specifications and retailer prices

From $3,815 SGD
As of November 4, 2026
Save $3,672 SGD (49%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $7,487 SGD at NZ Jewellers · As of November 5, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 629464478. Listed at 14 retailers as of November 4, 2026, with prices from $3,815 to $7,487, a $3,672 spread on the same certified stone. NZ Jewellers lists it at $7,487. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle41.2°
OriginNatural
Grading LabIGI
CertificateIGI 629464478
Dimensions6.94 × 6.99 × 4.35 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.94 mm6.99 mm1.29 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 629464478
Side View
Table 55.0%Crown 33.7°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.5%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: $4,013 SGD|Low: $3,967 SGD|High: $7,098 SGD|Avg: $4,894 SGD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6$3,967 SGD
Retailer 1$4,013 SGD
Retailer 7$4,463 SGD
Retailer 2$4,500 SGD
Retailer 3$4,991 SGD
Retailer 4$5,244 SGD
Retailer 5$6,995 SGD

41 data points across 7 retailers

14 retailers$3,815 SGD to $7,487 SGD

A
Cheapest Retailer
-
$3,815 SGD
A
Retailer 2
-
$3,967 SGD
View
Final sale: no returns
A
Retailer 3
-
$4,013 SGD
View
A
Retailer 4
-
$4,152 SGD
View
Retailer 5
-
$4,297 SGD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$4,297 SGD
View
A
Retailer 7
-
$4,463 SGD
View
B+
Retailer 8
-
$4,482 SGD
View
A
Retailer 9
-
$4,500 SGD
View
B+
Retailer 10
-
$4,959 SGD
View
B+
Retailer 11
-
$4,991 SGD
View
B+
Retailer 12
-
$5,244 SGD
View
B
Retailer 13
-
$6,995 SGD
View
Most Expensive
B
NZ Jewellers
3fecf4c4-363d-416e-babe-884dd73e005d · Nov 5
$7,487 SGD
$5,842 USD
View
13 more retailers have this diamond
Prices start from $3,815 SGDSave up to $3,672 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
$3,815 SGD