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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 $2,977 USD
As of November 4, 2026
Save $2,865 USD (49%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $5,842 USD 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 $2,977 to $5,842, a $2,865 spread on the same certified stone. NZ Jewellers lists it at $5,842. 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
Color
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $3,131 USD|Low: $3,095 USD|High: $5,538 USD|Avg: $3,819 USD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6$3,095 USD
Retailer 1$3,131 USD
Retailer 7$3,482 USD
Retailer 2$3,511 USD
Retailer 3$3,894 USD
Retailer 4$4,092 USD
Retailer 5$5,458 USD

41 data points across 7 retailers

14 retailers$2,977 USD to $5,842 USD

A
Cheapest Retailer
-
$2,977 USD
A
Retailer 2
-
$3,095 USD
View
Final sale: no returns
A
Retailer 3
-
$3,131 USD
View
A
Retailer 4
-
$3,240 USD
View
Retailer 5
-
$3,353 USD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$3,353 USD
View
A
Retailer 7
-
$3,482 USD
View
B+
Retailer 8
-
$3,497 USD
View
A
Retailer 9
-
$3,511 USD
View
B+
Retailer 10
-
$3,869 USD
View
B+
Retailer 11
-
$3,894 USD
View
B+
Retailer 12
-
$4,092 USD
View
B
Retailer 13
-
$5,458 USD
View
Most Expensive
B
NZ Jewellers
3fecf4c4-363d-416e-babe-884dd73e005d · Nov 5
$5,842 USD
View
13 more retailers have this diamond
Prices start from $2,977 USDSave up to $2,865 USD

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
$2,977 USD