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Round|Natural|GIA

1.00ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6555414004

Certificate GIA 6555414004

Diamond specifications and retailer prices

From £1,175 GBP
As of November 5, 2026
Save £2,294 GBP (66%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,469 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6555414004. Listed at 16 retailers as of November 5, 2026, with prices from £1,175 to £3,469, a £2,294 spread on the same certified stone. NZ Jewellers lists it at £3,469. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.00
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6555414004
Dimensions6.32 × 6.37 × 3.96 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle, Indented Natural, Natural
Top View
6.32 mm6.37 mm1.00 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6555414004
Side View
Table 57.0%Crown 36.5°Girdle: MED-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 5
Current: £3,469 GBP|Low: £1,113 GBP|High: £3,469 GBP|Avg: £1,551 GBP|+25.9%
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 6, 2026
Retailer 16£1,175 GBP
Retailer 3£1,243 GBP
Retailer 15£1,260 GBP
Retailer 4£1,288 GBP
Retailer 8£1,288 GBP
Retailer 17£1,340 GBP
Retailer 7£1,348 GBP
Retailer 9£1,358 GBP
Retailer 2£1,380 GBP
Retailer 5£1,389 GBP
Retailer 14£1,487 GBP
Retailer 6£1,488 GBP
Retailer 10£1,535 GBP
Retailer 13£1,827 GBP
Retailer 12£2,060 GBP
Retailer 11£2,485 GBP
NZ Jewellers£3,469 GBP

18 data points across 17 retailers

16 retailers£1,175 GBP to £3,469 GBP

A
Cheapest Retailer
-
£1,175 GBP
A
Retailer 2
-
£1,243 GBP
View
A
Retailer 3
-
£1,260 GBP
View
B+
Retailer 4
-
£1,288 GBP
View
B+
Retailer 5
-
£1,340 GBP
View
B+
Retailer 6
-
£1,348 GBP
View
Retailer 7
-
£1,358 GBP
View
Price last confirmed 22 days ago
B+
Retailer 8
-
£1,380 GBP
View
B+
Retailer 9
-
£1,389 GBP
View
B+
Retailer 10
-
£1,487 GBP
View
B+
Retailer 11
-
£1,488 GBP
View
B
Retailer 12
-
£1,535 GBP
View
B
Retailer 13
-
£1,827 GBP
View
B
Retailer 14
-
£2,060 GBP
View
B
Retailer 15
-
£2,485 GBP
View
Most Expensive
C
NZ Jewellers
7b1f8c66-e901-4452-839e-81f03380d61d · Nov 5
£3,469 GBP
$4,669 USD
View
15 more retailers have this diamond
Prices start from £1,175 GBPSave up to £2,294 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
£1,175 GBP