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Round|Natural|GIA

1.00ct H IF Round Natural Diamond

EX • H/IF • GIA 2558478534

Certificate GIA 2558478534

Diamond specifications and retailer prices

From £1,892 GBP
As of November 4, 2026
Save £2,566 GBP (58%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £4,459 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 H colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by GIA 2558478534. Listed at 19 retailers as of November 4, 2026, with prices from £1,892 to £4,459, a £2,566 spread on the same certified stone. NZ Jewellers lists it at £4,459. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
H
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2558478534
Dimensions6.33 × 6.38 × 3.97 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.33 mm6.38 mm1.00 ctH / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 2558478534
Side View
Table 57.0%Crown 36°Girdle: THN-STKPavilion 40.6°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 4
Current: £4,459 GBP|Low: £1,892 GBP|High: £4,459 GBP|Avg: £2,989 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 5, 2026
Retailer 13£1,892 GBP
Retailer 10£2,134 GBP
Retailer 14£2,362 GBP
Retailer 2£2,378 GBP
Retailer 8£2,443 GBP
Retailer 5£2,559 GBP
Retailer 4£2,658 GBP
Retailer 3£2,744 GBP
Retailer 6£2,953 GBP
Retailer 11£2,953 GBP
Retailer 7£2,976 GBP
Retailer 12£3,145 GBP
Retailer 9£4,268 GBP
NZ Jewellers£4,459 GBP

44 data points across 14 retailers

19 retailers£1,892 GBP to £4,459 GBP

A
Cheapest Retailer
-
£1,892 GBP
A
Retailer 2
-
£2,134 GBP
View
A
Retailer 3
-
£2,271 GBP
View
A
Retailer 4
-
£2,362 GBP
View
Final sale: no returns
A
Retailer 5
-
£2,378 GBP
View
A
Retailer 6
-
£2,443 GBP
View
A
Retailer 7
-
£2,481 GBP
View
A
Retailer 8
-
£2,559 GBP
View
Price last confirmed 7 days ago
Retailer 9
-
£2,627 GBP
View
Price last confirmed 9 days ago
A
Retailer 10
-
£2,658 GBP
View
Retailer 11
-
£2,744 GBP
View
Price last confirmed 32 days ago
B+
Retailer 12
-
£2,812 GBP
View
B+
Retailer 13
-
£2,953 GBP
View
B+
Retailer 14
-
£2,953 GBP
View
B+
Retailer 15
-
£2,976 GBP
View
B+
Retailer 16
-
£3,145 GBP
View
B
Retailer 17
-
£3,641 GBP
View
B+
Retailer 18
-
£4,268 GBP
View
Most Expensive
B
NZ Jewellers
f6228937-44fb-42ff-aabc-db2c2da6da36 · Nov 5
£4,459 GBP
$6,001 USD
View
18 more retailers have this diamond
Prices start from £1,892 GBPSave up to £2,566 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
£1,892 GBP