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Round|Natural|GIA

1.00ct K I1 Round Natural Diamond

EX • K/I1 • GIA 5413531239

Certificate GIA 5413531239

Diamond specifications and retailer prices

From £1,360 GBP
As of November 4, 2026
Save £2,430 GBP (64%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,789 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 K colour (faint-tinted) and I1 clarity (included), with a top-tier cut grade and certified by GIA 5413531239. Listed at 12 retailers as of November 4, 2026, with prices from £1,360 to £3,789, a £2,430 spread on the same certified stone. NZ Jewellers lists it at £3,789. 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
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 5413531239
Dimensions6.43 × 6.38 × 3.98 mm
L/W Ratio1.01
Top View
6.43 mm6.38 mm1.00 ctK / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5413531239
Side View
Table 59.0%Crown 34.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.1%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £3,789 GBP|Low: £1,350 GBP|High: £3,789 GBP|Avg: £1,966 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
November 5, 2026
Retailer 6£1,360 GBP
Retailer 5£1,441 GBP
Retailer 3£1,483 GBP
Retailer 8£1,485 GBP
Retailer 9£1,642 GBP
Retailer 11£1,642 GBP
Retailer 7£1,718 GBP
Retailer 10£1,895 GBP
Retailer 12£2,156 GBP
Retailer 2£2,248 GBP
Retailer 4£2,590 GBP
NZ Jewellers£3,789 GBP

24 data points across 12 retailers

12 retailers£1,360 GBP to £3,789 GBP

B
Cheapest Retailer
-
£1,360 GBP
B
Retailer 2
-
£1,441 GBP
View
B
Retailer 3
-
£1,485 GBP
View
Retailer 4
-
£1,642 GBP
View
Price last confirmed 56 days ago
Retailer 5
-
£1,642 GBP
View
Price last confirmed 8 days ago
B
Retailer 6
-
£1,642 GBP
View
B
Retailer 7
-
£1,718 GBP
View
Retailer 8
-
£1,895 GBP
View
Price last confirmed 60 days ago
B
Retailer 9
-
£1,895 GBP
View
B
Retailer 10
-
£2,248 GBP
View
Retailer 11
-
£3,789 GBP
View
Price last confirmed 57 days ago
Most Expensive
C
NZ Jewellers
f18f25e6-21ad-4998-b829-b65bdbbf91ca · Nov 5
£3,789 GBP
$5,100 USD
View
11 more retailers have this diamond
Prices start from £1,360 GBPSave up to £2,430 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.

B
1.00ct Round
£1,360 GBP