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Round|Natural|IGI

1.05ct H SI1 Round Natural Diamond

EX • H/SI1 • IGI 828653796

Shape and cutting style on the report: Round brilliant

Certificate IGI 828653796

Diamond specifications and retailer prices

From £1,571 GBP
As of November 6, 2026
Save £2,066 GBP (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,637 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 828653796. Listed at 14 retailers as of November 5, 2026, with prices from £1,571 to £3,637, a £2,066 spread on the same certified stone. NZ Jewellers lists it at £3,637. 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 angle36.3°
Pavilion angle40.1°
OriginNatural
Grading LabIGI
CertificateIGI 828653796
Dimensions6.41 × 6.49 × 4.02 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
6.41 mm6.49 mm1.05 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 828653796
Side View
Table 57.0%Crown 36.3°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 62.4%

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: £3,637 GBP|Low: £1,571 GBP|High: £3,637 GBP|Avg: £1,999 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 5£1,571 GBP
Retailer 6£1,606 GBP
Retailer 2£1,640 GBP
Retailer 4£1,696 GBP
Retailer 3£1,739 GBP
Retailer 11£1,739 GBP
Retailer 7£1,817 GBP
Retailer 13£1,820 GBP
Retailer 14£1,912 GBP
Retailer 9£1,977 GBP
Retailer 8£2,026 GBP
Retailer 10£2,123 GBP
Retailer 12£3,039 GBP
NZ Jewellers£3,637 GBP

8 data points across 14 retailers

14 retailers£1,571 GBP to £3,637 GBP

A
Cheapest Retailer
-
£1,571 GBP
A
Retailer 2
-
£1,606 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,640 GBP
View
A
Retailer 4
-
£1,696 GBP
View
A
Retailer 5
-
£1,739 GBP
View
A
Retailer 6
-
£1,739 GBP
View
B+
Retailer 7
-
£1,817 GBP
View
B+
Retailer 8
-
£1,820 GBP
View
B+
Retailer 9
-
£1,912 GBP
View
B+
Retailer 10
-
£1,977 GBP
View
B+
Retailer 11
-
£2,026 GBP
View
B+
Retailer 12
-
£2,123 GBP
View
B
Retailer 13
-
£3,039 GBP
View
Most Expensive
B
NZ Jewellers
1d7e74f0-7637-4c67-8077-76cf2e13601e · Nov 5
£3,637 GBP
$4,895 USD
View
13 more retailers have this diamond
Prices start from £1,571 GBPSave up to £2,066 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
£1,571 GBP