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Round|Natural|GIA

1.00ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 3545059321

Certificate GIA 3545059321

Diamond specifications and retailer prices

From £1,664 GBP
As of November 4, 2026
Save £1,988 GBP (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £4,566 GBP at NZ Jewellers · As of October 17, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3545059321. Listed at 18 retailers as of November 2, 2026, with a 119% 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle32.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 3545059321
Dimensions6.45 × 6.40 × 3.98 mm
L/W Ratio1.01
Top View
6.45 mm6.40 mm1.00 ctE / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 3545059321
Side View
Table 56.0%Crown 32.5°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.0%

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: £2,310 GBP|Low: £1,664 GBP|High: £3,807 GBP|Avg: £2,439 GBP
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 10£1,664 GBP
Retailer 7£1,730 GBP
Retailer 5£1,915 GBP
Retailer 8£1,937 GBP
Retailer 11£2,006 GBP
Retailer 3£2,016 GBP
Retailer 4£2,298 GBP
Retailer 1£2,310 GBP
Retailer 6£2,537 GBP
Retailer 9£3,653 GBP
Retailer 2£3,793 GBP

27 data points across 11 retailers

18 retailers£1,664 GBP to £3,653 GBP

A
Cheapest Retailer
-
£1,664 GBP
A
Retailer 2
-
£1,730 GBP
View
A
Retailer 3
-
£1,915 GBP
View
A
Retailer 4
-
£1,937 GBP
View
A
Retailer 5
-
£2,006 GBP
View
A
Retailer 6
-
£2,016 GBP
View
Final sale: no returns
A
Retailer 7
-
£2,057 GBP
View
Retailer 8
-
£2,184 GBP
View
Price last confirmed 21 days ago
Retailer 9
-
£2,184 GBP
View
Price last confirmed 17 days ago
Retailer 10
-
£2,268 GBP
View
Price last confirmed 22 days ago
B+
Retailer 11
-
£2,289 GBP
View
B+
Retailer 12
-
£2,298 GBP
View
Retailer 13
-
£2,310 GBP
View
Retailer 14
-
£2,520 GBP
View
Price last confirmed 19 days ago
B+
Retailer 15
-
£2,537 GBP
View
B
Retailer 16
-
£3,653 GBP
View
Retailer 17
-
£3,793 GBP
View
Price last confirmed 9 days ago
Most Expensive
NZ Jewellers
ee99d515-89b0-4947-b6a3-452c10ed6a7d · Oct 17
£4,566 GBP
$6,145 USD
View
Price last confirmed 19 days ago
17 more retailers have this diamond
Prices start from £1,664 GBPSave up to £1,988 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
£1,664 GBP