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Round|Natural|IGI

1.29ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 830652864

Shape and cutting style on the report: Round brilliant

Certificate IGI 830652864

Diamond specifications and retailer prices

From £1,321 GBP
₹168,593 INR
As of October 31, 2026
Save £2,283 GBP (63%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,604 GBP at NZ Jewellers · As of October 30, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 830652864. Listed at 15 retailers as of October 30, 2026, with prices from £1,321 to £3,604, a £2,283 spread on the same certified stone. NZ Jewellers lists it at £3,604. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 830652864
Dimensions6.91 × 6.94 × 4.34 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
6.91 mm6.94 mm1.29 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 830652864
Side View
Table 58.0%Crown 36.5°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.7%

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: Oct 31
Current: £3,604 GBP|Low: £1,318 GBP|High: £3,604 GBP|Avg: £1,918 GBP|+3.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 1, 2026
Retailer 9£1,321 GBP
Retailer 6£1,558 GBP
Retailer 15£1,586 GBP
Retailer 7£1,590 GBP
Retailer 2£1,636 GBP
Retailer 14£1,650 GBP
Retailer 4£1,724 GBP
Retailer 12£1,724 GBP
Retailer 13£1,804 GBP
Retailer 3£1,828 GBP
Retailer 11£1,976 GBP
Retailer 5£1,989 GBP
Retailer 10£2,058 GBP
Retailer 8£3,021 GBP
NZ Jewellers£3,604 GBP

27 data points across 15 retailers

15 retailers£1,321 GBP to £3,604 GBP

A
Cheapest Retailer
-
£1,321 GBP
₹168,593 INR
A
Retailer 2
-
£1,558 GBP
$2,087 USD
View
Retailer 3
-
£1,586 GBP
$2,125 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
£1,590 GBP
$2,131 USD
View
Final sale: no returns
A
Retailer 5
-
£1,636 GBP
View
A
Retailer 6
-
£1,650 GBP
$2,211 USD
View
A
Retailer 7
-
£1,724 GBP
$2,310 USD
View
A
Retailer 8
-
£1,724 GBP
$2,310 USD
View
A
Retailer 9
-
£1,804 GBP
$2,417 USD
View
A
Retailer 10
-
£1,828 GBP
$2,450 USD
View
A
Retailer 11
-
£1,976 GBP
View
A
Retailer 12
-
£1,989 GBP
$2,665 USD
View
A
Retailer 13
-
£2,058 GBP
€2,626 EUR
View
B+
Retailer 14
-
£3,021 GBP
View
Most Expensive
B
NZ Jewellers
281202a8-381d-4f81-ad21-f72f26e4eae4 · Oct 30
£3,604 GBP
$4,829 USD
View
14 more retailers have this diamond
Prices start from £1,321 GBPSave up to £2,283 GBP

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
£1,321 GBP