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Round|Natural|IGI

1.00ct I IF Round Natural Diamond

EX • I/IF • IGI 839689459

Shape and cutting style on the report: Round brilliant

Certificate IGI 839689459

Diamond specifications and retailer prices

From £1,734 GBP
As of November 4, 2026
Save £2,322 GBP (57%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £4,056 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI 839689459. Listed at 17 retailers as of November 4, 2026, with prices from £1,734 to £4,056, a £2,322 spread on the same certified stone. NZ Jewellers lists it at £4,056. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
I
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle41.5°
OriginNatural
Grading LabIGI
CertificateIGI 839689459
Dimensions6.52 × 6.55 × 3.89 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
6.52 mm6.55 mm1.00 ctI / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 839689459
Side View
Table 62.0%Crown 32.8°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 59.5%

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: £4,056 GBP|Low: £1,734 GBP|High: £4,056 GBP|Avg: £2,290 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
Retailer 15
Retailer 16
Retailer 17
November 5, 2026
Retailer 13£1,734 GBP
Retailer 16£1,737 GBP
Retailer 17£1,790 GBP
Retailer 7£1,847 GBP
Retailer 4£1,915 GBP
Retailer 3£1,940 GBP
Retailer 8£1,940 GBP
Retailer 6£2,014 GBP
Retailer 9£2,042 GBP
Retailer 10£2,077 GBP
Retailer 15£2,239 GBP
Retailer 12£2,253 GBP
Retailer 14£2,384 GBP
Retailer 2£2,406 GBP
Retailer 5£2,799 GBP
Retailer 11£3,389 GBP
NZ Jewellers£4,056 GBP

16 data points across 17 retailers

17 retailers£1,734 GBP to £4,056 GBP

A
Cheapest Retailer
-
£1,734 GBP
A
Retailer 2
-
£1,737 GBP
View
A
Retailer 3
-
£1,790 GBP
View
Final sale: no returns
A
Retailer 4
-
£1,847 GBP
View
A
Retailer 5
-
£1,915 GBP
View
A
Retailer 6
-
£1,940 GBP
View
A
Retailer 7
-
£1,940 GBP
View
A
Retailer 8
-
£2,014 GBP
View
A
Retailer 9
-
£2,042 GBP
View
A
Retailer 10
-
£2,077 GBP
View
A
Retailer 11
-
£2,239 GBP
View
A
Retailer 12
-
£2,253 GBP
View
A
Retailer 13
-
£2,384 GBP
View
A
Retailer 14
-
£2,406 GBP
View
B+
Retailer 15
-
£2,799 GBP
View
B+
Retailer 16
-
£3,389 GBP
View
Most Expensive
B
NZ Jewellers
c49beb51-eaf6-4818-88cf-2fda20285fa5 · Nov 5
£4,056 GBP
$5,475 USD
View
16 more retailers have this diamond
Prices start from £1,734 GBPSave up to £2,322 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
1.00ct Round
£1,734 GBP