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Round|Natural|IGI

1.05ct H SI1 Round Natural Diamond

EX • H/SI1 • IGI 826681826

Shape and cutting style on the report: Round brilliant

Certificate IGI 826681826

Diamond specifications and retailer prices

From £1,685 GBP
As of November 6, 2026
Save £2,215 GBP (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,900 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.05ct natural round diamond

This 1.05ct natural round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 826681826. Listed at 18 retailers as of November 5, 2026, with prices from £1,685 to £3,900, a £2,215 spread on the same certified stone. NZ Jewellers lists it at £3,900. 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

1.05
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle41.5°
OriginNatural
Grading LabIGI
CertificateIGI 826681826
Dimensions6.42 × 6.46 × 4.09 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.42 mm6.46 mm1.05 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 826681826
Side View
Table 58.0%Crown 36.4°Girdle: MediumPavilion 41.5°CuletDepth 63.5%

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 6
Current: £3,900 GBP|Low: £1,685 GBP|High: £3,900 GBP|Avg: £2,260 GBP
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
November 6, 2026
Retailer 6£1,685 GBP
Retailer 4£1,687 GBP
Retailer 11£1,722 GBP
Retailer 5£1,863 GBP
Retailer 14£1,866 GBP
Retailer 12£1,952 GBP
Retailer 2£1,997 GBP
Retailer 3£2,152 GBP
Retailer 7£2,175 GBP
Retailer 8£2,207 GBP
Retailer 9£2,277 GBP
Retailer 13£2,629 GBP
Retailer 10£3,259 GBP
NZ Jewellers£3,900 GBP

41 data points across 14 retailers

18 retailers£1,685 GBP to £3,900 GBP

A
Cheapest Retailer
-
£1,685 GBP
A
Retailer 2
-
£1,687 GBP
View
A
Retailer 3
-
£1,722 GBP
View
Final sale: no returns
B+
Retailer 4
-
£1,863 GBP
View
B+
Retailer 5
-
£1,866 GBP
View
Retailer 6
-
£1,866 GBP
View
Price last confirmed 56 days ago
B+
Retailer 7
-
£1,952 GBP
View
B+
Retailer 8
-
£1,970 GBP
View
B+
Retailer 9
-
£1,997 GBP
View
Retailer 10
-
£2,152 GBP
View
Price last confirmed 60 days ago
B+
Retailer 11
-
£2,152 GBP
View
B+
Retailer 12
-
£2,175 GBP
View
B+
Retailer 13
-
£2,207 GBP
View
B+
Retailer 14
-
£2,277 GBP
View
B
Retailer 15
-
£2,629 GBP
View
B
Retailer 16
-
£3,259 GBP
View
Retailer 17
-
£3,900 GBP
View
Price last confirmed 57 days ago
Most Expensive
B
NZ Jewellers
19af69cb-3516-48f6-ab75-96d7b98d24ed · Nov 5
£3,900 GBP
$5,249 USD
View
17 more retailers have this diamond
Prices start from £1,685 GBPSave up to £2,215 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
1.05ct Round
£1,685 GBP