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Round|Natural|IGI

1.00ct I IF Round Natural Diamond

EX • I/IF • IGI 654416351

Shape and cutting style on the report: Round brilliant

Certificate IGI 654416351

Diamond specifications and retailer prices

From £1,622 GBP
As of November 1, 2026
Save £1,522 GBP (48%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,864 GBP at NZ Jewellers · As of October 17, 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 654416351. Listed at 18 retailers as of November 1, 2026, with a 94% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle33.9°
Pavilion angle41°
OriginNatural
Grading LabIGI
CertificateIGI 654416351
Dimensions6.35 × 6.44 × 3.97 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.35 mm6.44 mm1.00 ctI / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 654416351
Side View
Table 56.0%Crown 33.9°Girdle: THN-STKPavilion 41°Culet: NoneDepth 62.0%

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 1
Current: £1,940 GBP|Low: £1,381 GBP|High: £3,277 GBP|Avg: £2,041 GBP|+3.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 8£1,622 GBP
Retailer 5£1,622 GBP
Retailer 6£1,651 GBP
Retailer 9£1,657 GBP
Retailer 1£1,940 GBP
Retailer 7£2,055 GBP
Retailer 4£2,206 GBP
Retailer 2£2,231 GBP
Retailer 3£3,144 GBP

36 data points across 9 retailers

18 retailers£1,622 GBP to £3,144 GBP

A
Cheapest Retailer
-
£1,622 GBP
A
Retailer 2
-
£1,622 GBP
View
A
Retailer 3
-
£1,651 GBP
View
A
Retailer 4
-
£1,657 GBP
View
Final sale: no returns
Retailer 5
-
£1,795 GBP
View
Price last confirmed 55 days ago
Retailer 6
-
£1,795 GBP
View
Price last confirmed 43 days ago
Retailer 7
-
£1,848 GBP
View
Price last confirmed 20 days ago
Retailer 8
-
£1,848 GBP
View
Price last confirmed 18 days ago
A
Retailer 9
-
£1,940 GBP
View
A
Retailer 10
-
£2,055 GBP
View
Retailer 11
-
£2,071 GBP
View
Price last confirmed 59 days ago
Retailer 12
-
£2,071 GBP
View
Price last confirmed 44 days ago
A
Retailer 13
-
£2,206 GBP
View
A
Retailer 14
-
£2,231 GBP
View
B+
Retailer 15
-
£3,144 GBP
View
Retailer 16
-
£3,752 GBP
View
Price last confirmed 56 days ago
Retailer 17
-
£3,752 GBP
View
Price last confirmed 45 days ago
Most Expensive
NZ Jewellers
bdeaa615-7175-4fb5-bd0a-485c6e2d260e · Oct 17
£3,864 GBP
$5,217 USD
View
Price last confirmed 18 days ago
17 more retailers have this diamond
Prices start from £1,622 GBPSave up to £1,522 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
£1,622 GBP