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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 €2,666 EUR
As of November 4, 2026
Save €2,566 EUR (49%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €5,232 EUR 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 €2,666 to €5,232, a €2,566 spread on the same certified stone. NZ Jewellers lists it at €5,232. 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: €2,804 EUR|Low: €2,772 EUR|High: €4,960 EUR|Avg: €3,421 EUR|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6€2,772 EUR
Retailer 1€2,804 EUR
Retailer 7€3,119 EUR
Retailer 2€3,145 EUR
Retailer 3€3,488 EUR
Retailer 4€3,665 EUR
Retailer 5€4,889 EUR

41 data points across 7 retailers

14 retailers€2,666 EUR to €5,232 EUR

A
Cheapest Retailer
-
€2,666 EUR
A
Retailer 2
-
€2,772 EUR
View
Final sale: no returns
A
Retailer 3
-
€2,804 EUR
View
A
Retailer 4
-
€2,902 EUR
View
Retailer 5
-
€3,003 EUR
View
Price last confirmed 8 days ago
A
Retailer 6
-
€3,003 EUR
View
A
Retailer 7
-
€3,119 EUR
View
B+
Retailer 8
-
€3,132 EUR
View
A
Retailer 9
-
€3,145 EUR
View
B+
Retailer 10
-
€3,465 EUR
View
B+
Retailer 11
-
€3,488 EUR
View
B+
Retailer 12
-
€3,665 EUR
View
B
Retailer 13
-
€4,889 EUR
View
Most Expensive
B
NZ Jewellers
3fecf4c4-363d-416e-babe-884dd73e005d · Nov 5
€5,232 EUR
$5,842 USD
View
13 more retailers have this diamond
Prices start from €2,666 EURSave up to €2,566 EUR

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
€2,666 EUR