Round|Natural|GIA

1.00ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6435180932

Certificate GIA 6435180932

Diamond specifications and retailer prices

From £1,941 GBP
As of November 6, 2026
Save £2,227 GBP (53%) vs most expensive(unlock to see where)
34 retailers carry this diamond
Most expensive: £4,169 GBP at NZ Jewellers · As of October 20, 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 top-tier cut grade and certified by GIA 6435180932. Listed at 34 retailers as of November 5, 2026, with a 115% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
Crown angle33°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6435180932
Dimensions6.48 × 6.42 × 3.90 mm
L/W Ratio1.01
Top View
6.48 mm6.42 mm1.00 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6435180932
Side View
Table 62.0%Crown 33°Girdle: MediumPavilion 41.2°Culet: NoneDepth 60.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,461 GBP|Low: £1,969 GBP|High: £4,049 GBP|Avg: £2,833 GBP|-0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9£1,969 GBP
Retailer 3£2,001 GBP
Retailer 12£2,168 GBP
Retailer 5£2,288 GBP
Retailer 2£2,459 GBP
Retailer 1£2,461 GBP
Retailer 4£2,566 GBP
Retailer 6£2,779 GBP
Retailer 8£2,783 GBP
Retailer 7£2,921 GBP
Retailer 11£3,963 GBP
Retailer 10£4,002 GBP

36 data points across 12 retailers

34 retailers£1,941 GBP to £4,169 GBP

A
Cheapest Retailer
-
£1,941 GBP
A
Retailer 2
-
£1,969 GBP
View
A
Retailer 3
-
£2,001 GBP
View
Final sale: no returns
A
Retailer 4
-
£2,118 GBP
View
Retailer 5
-
£2,168 GBP
View
Price last confirmed 50 days ago
Retailer 6
-
£2,168 GBP
View
Price last confirmed 28 days ago
Retailer 7
-
£2,168 GBP
View
Price last confirmed 8 days ago
Retailer 8
-
£2,168 GBP
View
Price last confirmed 21 days ago
Retailer 9
-
£2,168 GBP
View
Price last confirmed 15 days ago
B+
Retailer 10
-
£2,189 GBP
View
Retailer 11
-
£2,251 GBP
View
Price last confirmed 38 days ago
A
Retailer 12
-
£2,288 GBP
View
B+
Retailer 13
-
£2,370 GBP
View
B+
Retailer 14
-
£2,370 GBP
View
B+
Retailer 15
-
£2,452 GBP
View
B+
Retailer 16
-
£2,459 GBP
View
Retailer 17
-
£2,459 GBP
View
Price last confirmed 28 days ago
B+
Retailer 18
-
£2,461 GBP
View
Retailer 19
-
£2,502 GBP
View
Price last confirmed 28 days ago
Retailer 20
-
£2,502 GBP
View
Price last confirmed 45 days ago
Retailer 21
-
£2,502 GBP
View
Price last confirmed 16 days ago
B+
Retailer 22
-
£2,502 GBP
View
Retailer 23
-
£2,566 GBP
View
Price last confirmed 33 days ago
B+
Retailer 24
-
£2,665 GBP
View
Retailer 25
-
£2,776 GBP
View
Price last confirmed 22 days ago
B+
Retailer 26
-
£2,779 GBP
View
B+
Retailer 27
-
£2,783 GBP
View
B+
Retailer 28
-
£2,921 GBP
View
Retailer 29
-
£3,963 GBP
View
Price last confirmed 9 days ago
B
Retailer 30
-
£4,002 GBP
View
B
Retailer 31
-
£4,169 GBP
View
Retailer 32
-
£4,169 GBP
View
Price last confirmed 39 days ago
Retailer 33
-
£4,169 GBP
View
Price last confirmed 48 days ago
Most Expensive
NZ Jewellers
8b22a2a6-3c47-4f47-b165-e8d03f8bd461 · Oct 20
£4,169 GBP
$5,611 USD
View
Price last confirmed 16 days ago
33 more retailers have this diamond
Prices start from £1,941 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
£1,941 GBP