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Round|Natural|GIA

1.00ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 6555401272

Certificate GIA 6555401272

Diamond specifications and retailer prices

From £1,302 GBP
As of November 6, 2026
Save £2,227 GBP (63%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £3,529 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 6555401272. Listed at 21 retailers as of November 5, 2026, with prices from £1,302 to £3,529, a £2,227 spread on the same certified stone. NZ Jewellers lists it at £3,529. 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 angle33.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 6555401272
Dimensions6.35 × 6.39 × 3.95 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Crystal
Top View
6.35 mm6.39 mm1.00 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555401272
Side View
Table 61.0%Crown 33.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.9%

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: £1,571 GBP|Low: £1,302 GBP|High: £2,973 GBP|Avg: £1,774 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 3£1,302 GBP
Retailer 8£1,308 GBP
Retailer 6£1,409 GBP
Retailer 9£1,487 GBP
Retailer 1£1,571 GBP
Retailer 2£1,624 GBP
Retailer 4£1,810 GBP
Retailer 5£1,823 GBP
Retailer 7£1,938 GBP
Retailer 10£2,029 GBP
Retailer 11£2,950 GBP

25 data points across 11 retailers

21 retailers£1,302 GBP to £3,529 GBP

A
Cheapest Retailer
-
£1,302 GBP
A
Retailer 2
-
£1,308 GBP
View
A
Retailer 3
-
£1,409 GBP
View
A
Retailer 4
-
£1,487 GBP
View
A
Retailer 5
-
£1,525 GBP
View
A
Retailer 6
-
£1,557 GBP
View
Final sale: no returns
A
Retailer 7
-
£1,571 GBP
View
A
Retailer 8
-
£1,624 GBP
View
Retailer 9
-
£1,688 GBP
View
Price last confirmed 8 days ago
A
Retailer 10
-
£1,688 GBP
View
B+
Retailer 11
-
£1,766 GBP
View
B+
Retailer 12
-
£1,791 GBP
View
B+
Retailer 13
-
£1,810 GBP
View
B+
Retailer 14
-
£1,823 GBP
View
B+
Retailer 15
-
£1,841 GBP
View
B+
Retailer 16
-
£1,938 GBP
View
B+
Retailer 17
-
£1,947 GBP
View
B+
Retailer 18
-
£2,029 GBP
View
B
Retailer 19
-
£2,517 GBP
View
B
Retailer 20
-
£2,950 GBP
View
Most Expensive
B
NZ Jewellers
856f0a8c-3b65-4e36-9112-446ac20fed2e · Nov 5
£3,529 GBP
$4,750 USD
View
20 more retailers have this diamond
Prices start from £1,302 GBPSave up to £2,227 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
£1,302 GBP