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Round|Natural|GIA

1.00ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6565439499

Certificate GIA 6565439499

Diamond specifications and retailer prices

From £1,693 GBP
As of November 4, 2026
Save £3,007 GBP (64%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,699 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 top-tier cut grade and certified by GIA 6565439499. Listed at 21 retailers as of November 4, 2026, with prices from £1,693 to £4,699, a £3,007 spread on the same certified stone. NZ Jewellers lists it at £4,699. 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
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6565439499
Dimensions6.40 × 6.37 × 4.01 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Top View
6.40 mm6.37 mm1.00 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6565439499
Side View
Table 55.0%Crown 36°Girdle: MED-MEDPavilion 40.8°Culet: NoneDepth 62.8%

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: £2,353 GBP|Low: £1,693 GBP|High: £3,779 GBP|Avg: £2,282 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 4£1,693 GBP
Retailer 11£1,698 GBP
Retailer 5£1,860 GBP
Retailer 12£1,933 GBP
Retailer 13£1,950 GBP
Retailer 8£2,033 GBP
Retailer 9£2,149 GBP
Retailer 3£2,158 GBP
Retailer 6£2,332 GBP
Retailer 1£2,353 GBP
Retailer 7£2,485 GBP
Retailer 10£2,604 GBP
Retailer 2£3,759 GBP

22 data points across 13 retailers

21 retailers£1,693 GBP to £4,699 GBP

A
Cheapest Retailer
-
£1,693 GBP
A
Retailer 2
-
£1,698 GBP
View
Retailer 3
-
£1,860 GBP
View
Price last confirmed 11 days ago
A
Retailer 4
-
£1,904 GBP
View
A
Retailer 5
-
£1,933 GBP
View
A
Retailer 6
-
£1,950 GBP
View
A
Retailer 7
-
£1,979 GBP
View
A
Retailer 8
-
£2,033 GBP
View
A
Retailer 9
-
£2,074 GBP
View
Final sale: no returns
A
Retailer 10
-
£2,149 GBP
View
A
Retailer 11
-
£2,158 GBP
View
A
Retailer 12
-
£2,248 GBP
View
A
Retailer 13
-
£2,332 GBP
View
B+
Retailer 14
-
£2,334 GBP
View
Retailer 15
-
£2,353 GBP
View
B+
Retailer 16
-
£2,485 GBP
View
B+
Retailer 17
-
£2,594 GBP
View
B+
Retailer 18
-
£2,604 GBP
View
B+
Retailer 19
-
£3,272 GBP
View
B
Retailer 20
-
£3,759 GBP
View
Most Expensive
B
NZ Jewellers
7a2dbb6a-4cc8-405f-9168-08fa7d082c80 · Nov 5
£4,699 GBP
$6,325 USD
View
20 more retailers have this diamond
Prices start from £1,693 GBPSave up to £3,007 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
£1,693 GBP