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Round|Natural|GIA

1.00ct K IF Round Natural Diamond

EX • K/IF • GIA 2558664557

Certificate GIA 2558664557

Diamond specifications and retailer prices

From £1,783 GBP
As of November 5, 2026
Save £1,465 GBP (45%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £4,036 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by GIA 2558664557. Listed at 11 retailers as of November 1, 2026, with a 82% 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
K
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2558664557
Dimensions6.37 × 6.32 × 3.99 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Top View
6.37 mm6.32 mm1.00 ctK / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2558664557
Side View
Table 55.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 63.0%

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 5
Current: £1,950 GBP|Low: £1,783 GBP|High: £3,422 GBP|Avg: £2,369 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6£1,783 GBP
Retailer 1£1,950 GBP
Retailer 2£2,193 GBP
Retailer 3£2,262 GBP
Retailer 4£2,300 GBP
Retailer 5£3,248 GBP

44 data points across 6 retailers

11 retailers£1,783 GBP to £3,248 GBP

A
Cheapest Retailer
-
£1,783 GBP
Retailer 2
-
£1,930 GBP
View
Price last confirmed 29 days ago
Retailer 3
-
£1,930 GBP
View
Price last confirmed 29 days ago
A
Retailer 4
-
£1,950 GBP
View
Retailer 5
-
£2,019 GBP
View
Price last confirmed 38 days ago
B+
Retailer 6
-
£2,193 GBP
View
Retailer 7
-
£2,227 GBP
View
Price last confirmed 38 days ago
B+
Retailer 8
-
£2,262 GBP
View
B+
Retailer 9
-
£2,300 GBP
View
B
Retailer 10
-
£3,248 GBP
View
Most Expensive
NZ Jewellers
686bea8f-1fb0-4f7f-9266-b62cb1d03855 · Sep 28
£4,036 GBP
$5,432 USD
View
Price last confirmed 39 days ago
10 more retailers have this diamond
Prices start from £1,783 GBPSave up to £1,465 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
£1,783 GBP