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Round|Natural|GIA

1.00ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 6555742497

Certificate GIA 6555742497

Diamond specifications and retailer prices

From £1,703 GBP
As of November 6, 2026
Save £2,811 GBP (62%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £4,514 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6555742497. Listed at 26 retailers as of November 5, 2026, with prices from £1,703 to £4,514, a £2,811 spread on the same certified stone. NZ Jewellers lists it at £4,514. 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6555742497
Dimensions6.44 × 6.46 × 3.91 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Top View
6.44 mm6.46 mm1.00 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555742497
Side View
Table 57.0%Crown 34°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 60.6%

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 6
Current: £2,009 GBP|Low: £1,713 GBP|High: £3,654 GBP|Avg: £2,312 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5£1,713 GBP
Retailer 1£2,009 GBP
Retailer 6£2,031 GBP
Retailer 7£2,122 GBP
Retailer 8£2,123 GBP
Retailer 2£2,272 GBP
Retailer 3£2,356 GBP
Retailer 4£3,601 GBP

42 data points across 8 retailers

26 retailers£1,703 GBP to £4,514 GBP

A
Cheapest Retailer
-
£1,703 GBP
A
Retailer 2
-
£1,713 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,716 GBP
View
A
Retailer 4
-
£1,752 GBP
View
B+
Retailer 5
-
£1,815 GBP
View
B+
Retailer 6
-
£1,846 GBP
View
B+
Retailer 7
-
£1,956 GBP
View
Retailer 8
-
£1,956 GBP
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£1,985 GBP
View
B+
Retailer 10
-
£2,009 GBP
View
B+
Retailer 11
-
£2,031 GBP
View
B+
Retailer 12
-
£2,122 GBP
View
B+
Retailer 13
-
£2,122 GBP
View
B+
Retailer 14
-
£2,123 GBP
View
B+
Retailer 15
-
£2,138 GBP
View
B+
Retailer 16
-
£2,236 GBP
View
B+
Retailer 17
-
£2,236 GBP
View
B+
Retailer 18
-
£2,256 GBP
View
B+
Retailer 19
-
£2,257 GBP
View
B+
Retailer 20
-
£2,272 GBP
View
B
Retailer 21
-
£2,311 GBP
View
B+
Retailer 22
-
£2,356 GBP
View
B
Retailer 23
-
£2,617 GBP
View
B
Retailer 24
-
£3,112 GBP
View
B
Retailer 25
-
£3,601 GBP
View
Most Expensive
B
NZ Jewellers
3e6af43f-47f0-4dd2-a37d-27fc8b5b5cca · Nov 5
£4,514 GBP
$6,076 USD
View
25 more retailers have this diamond
Prices start from £1,703 GBPSave up to £2,811 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
£1,703 GBP