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Round|Natural|GIA

1.00ct E SI1 Round Natural Diamond

VG • E/SI1 • GIA 7556341509

Certificate GIA 7556341509

Diamond specifications and retailer prices

From £1,560 GBP
As of November 4, 2026
Save £2,617 GBP (63%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: £4,176 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 E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 7556341509. Listed at 27 retailers as of November 4, 2026, with prices from £1,560 to £4,176, a £2,617 spread on the same certified stone. NZ Jewellers lists it at £4,176. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle31.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 7556341509
Dimensions6.49 × 6.42 × 3.83 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Feather, Indented Natural, Needle, Natural
Top View
6.49 mm6.42 mm1.00 ctE / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 7556341509
Side View
Table 64.0%Crown 31.5°Girdle: THN-THKPavilion 41.2°Culet: NoneDepth 59.3%

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 4
Current: £4,176 GBP|Low: £1,550 GBP|High: £4,176 GBP|Avg: £2,214 GBP
NZ Jewellers
Retailer 2
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Retailer 25
Retailer 26
November 6, 2026
Retailer 3£1,560 GBP
Retailer 23£1,565 GBP
Retailer 11£1,765 GBP
Retailer 17£1,768 GBP
Retailer 24£1,785 GBP
Retailer 15£1,789 GBP
Retailer 12£1,844 GBP
Retailer 20£1,910 GBP
Retailer 4£1,969 GBP
Retailer 8£1,985 GBP
Retailer 6£1,998 GBP
Retailer 9£1,998 GBP
Retailer 10£2,003 GBP
Retailer 7£2,074 GBP
Retailer 13£2,102 GBP
Retailer 5£2,103 GBP
Retailer 2£2,172 GBP
Retailer 19£2,287 GBP
Retailer 14£2,305 GBP
Retailer 21£2,340 GBP
Retailer 25£2,433 GBP
Retailer 22£2,438 GBP
Retailer 16£2,939 GBP
Retailer 18£3,020 GBP
Retailer 26£3,490 GBP
NZ Jewellers£4,176 GBP

20 data points across 26 retailers

27 retailers£1,560 GBP to £4,176 GBP

A
Cheapest Retailer
-
£1,560 GBP
A
Retailer 2
-
£1,565 GBP
View
A
Retailer 3
-
£1,765 GBP
View
A
Retailer 4
-
£1,768 GBP
View
A
Retailer 5
-
£1,785 GBP
View
A
Retailer 6
-
£1,789 GBP
View
A
Retailer 7
-
£1,844 GBP
View
Final sale: no returns
A
Retailer 8
-
£1,910 GBP
View
B+
Retailer 9
-
£1,969 GBP
View
A
Retailer 10
-
£1,985 GBP
View
Retailer 11
-
£1,998 GBP
View
Price last confirmed 8 days ago
A
Retailer 12
-
£1,998 GBP
View
A
Retailer 13
-
£2,003 GBP
View
B+
Retailer 14
-
£2,074 GBP
View
A
Retailer 15
-
£2,102 GBP
View
B+
Retailer 16
-
£2,103 GBP
View
B+
Retailer 17
-
£2,172 GBP
View
B+
Retailer 18
-
£2,287 GBP
View
B+
Retailer 19
-
£2,305 GBP
View
B+
Retailer 20
-
£2,340 GBP
View
Retailer 21
-
£2,349 GBP
View
Price last confirmed 30 days ago
B+
Retailer 22
-
£2,433 GBP
View
B+
Retailer 23
-
£2,438 GBP
View
B
Retailer 24
-
£2,939 GBP
View
B
Retailer 25
-
£3,020 GBP
View
B
Retailer 26
-
£3,490 GBP
View
Most Expensive
B
NZ Jewellers
5902ba5c-c8b1-40b6-acc0-31f7ddff97ce · Nov 5
£4,176 GBP
$5,621 USD
View
26 more retailers have this diamond
Prices start from £1,560 GBPSave up to £2,617 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
£1,560 GBP