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Round|Natural|GIA

1.03ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2566398726

Certificate GIA 2566398726

Diamond specifications and retailer prices

From £1,759 GBP
As of November 4, 2026
Save £2,193 GBP (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,953 GBP at NZ Jewellers · As of November 2, 2026
View at NZ Jewellers

About this 1.03ct natural round diamond

This 1.03ct 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 2566398726. Listed at 16 retailers as of November 2, 2026, with prices from £1,759 to £3,953, a £2,193 spread on the same certified stone. NZ Jewellers lists it at £3,953. 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

1.03
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2566398726
Dimensions6.53 × 6.55 × 3.95 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
6.53 mm6.55 mm1.03 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2566398726
Side View
Table 58.0%Crown 33.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.4%

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: £3,953 GBP|Low: £1,759 GBP|High: £4,242 GBP|Avg: £2,538 GBP|-6.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 4, 2026
Retailer 2£1,759 GBP
Retailer 13£1,775 GBP
Retailer 10£1,979 GBP
Retailer 8£2,095 GBP
Retailer 4£2,139 GBP
Retailer 14£2,230 GBP
Retailer 7£2,240 GBP
Retailer 11£2,269 GBP
Retailer 9£2,318 GBP
Retailer 3£2,407 GBP
Retailer 5£2,488 GBP
Retailer 6£2,504 GBP
Retailer 12£2,589 GBP
Retailer 16£2,674 GBP
Retailer 15£3,876 GBP
NZ Jewellers£3,953 GBP

26 data points across 16 retailers

16 retailers£1,759 GBP to £3,953 GBP

A
Cheapest Retailer
-
£1,759 GBP
A
Retailer 2
-
£1,775 GBP
View
A
Retailer 3
-
£1,979 GBP
View
A
Retailer 4
-
£2,095 GBP
View
A
Retailer 5
-
£2,230 GBP
View
A
Retailer 6
-
£2,240 GBP
View
A
Retailer 7
-
£2,269 GBP
View
A
Retailer 8
-
£2,318 GBP
View
B+
Retailer 9
-
£2,407 GBP
View
B+
Retailer 10
-
£2,488 GBP
View
Retailer 11
-
£2,504 GBP
View
Price last confirmed 10 days ago
B+
Retailer 12
-
£2,589 GBP
View
B+
Retailer 13
-
£2,674 GBP
View
Retailer 14
-
£2,684 GBP
View
Price last confirmed 30 days ago
B
Retailer 15
-
£3,876 GBP
View
Most Expensive
B
NZ Jewellers
50fac8a4-b084-4287-902a-f994f3f5cc93 · Nov 2
£3,953 GBP
$5,320 USD
View
15 more retailers have this diamond
Prices start from £1,759 GBPSave up to £2,193 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
1.03ct Round
£1,759 GBP