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Round|Natural|IGI

1.03ct F SI1 Round Natural Diamond

EX • F/SI1 • IGI 801639013

Shape and cutting style on the report: Round brilliant

Certificate IGI 801639013

Diamond specifications and retailer prices

From £1,479 GBP
$1,985 USD
As of November 1, 2026
Save £2,046 GBP (58%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,525 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 801639013. Listed at 16 retailers as of November 1, 2026, with prices from £1,479 to £3,525, a £2,046 spread on the same certified stone. NZ Jewellers lists it at £3,525. 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
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.1°
Pavilion angle41°
OriginNatural
Grading LabIGI
CertificateIGI 801639013
Dimensions6.40 × 6.43 × 4.04 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
6.40 mm6.43 mm1.03 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 801639013
Side View
Table 56.0%Crown 35.1°Girdle: MED-STKPavilion 41°Culet: NoneDepth 63.0%

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 1
Current: £3,525 GBP|Low: £1,479 GBP|High: £3,525 GBP|Avg: £1,970 GBP
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 2, 2026
Retailer 6£1,479 GBP
Retailer 5£1,523 GBP
Retailer 7£1,556 GBP
Retailer 3£1,595 GBP
Retailer 2£1,622 GBP
Retailer 4£1,686 GBP
Retailer 14£1,686 GBP
Retailer 15£1,692 GBP
Retailer 16£1,764 GBP
Retailer 13£1,790 GBP
Retailer 9£1,872 GBP
Retailer 8£1,946 GBP
Retailer 12£2,073 GBP
Retailer 10£2,097 GBP
Retailer 11£2,955 GBP
NZ Jewellers£3,525 GBP

8 data points across 16 retailers

16 retailers£1,479 GBP to £3,525 GBP

A
Cheapest Retailer
-
£1,479 GBP
$1,985 USD
A
Retailer 2
-
£1,523 GBP
$2,044 USD
View
A
Retailer 3
-
£1,556 GBP
$2,088 USD
View
Final sale: no returns
A
Retailer 4
-
£1,595 GBP
$2,141 USD
View
A
Retailer 5
-
£1,622 GBP
View
A
Retailer 6
-
£1,686 GBP
$2,263 USD
View
A
Retailer 7
-
£1,686 GBP
$2,263 USD
View
A
Retailer 8
-
£1,692 GBP
$2,270 USD
View
A
Retailer 9
-
£1,764 GBP
$2,367 USD
View
A
Retailer 10
-
£1,790 GBP
$2,402 USD
View
A
Retailer 11
-
£1,872 GBP
View
B+
Retailer 12
-
£1,946 GBP
$2,611 USD
View
B+
Retailer 13
-
£2,073 GBP
ZAR 44,933 ZAR
View
B+
Retailer 14
-
£2,097 GBP
€2,680 EUR
View
B+
Retailer 15
-
£2,955 GBP
View
Most Expensive
B
NZ Jewellers
e1337ce9-913f-49c0-85d2-36b6ab1b47f3 · Nov 2
£3,525 GBP
$4,731 USD
View
15 more retailers have this diamond
Prices start from £1,479 GBPSave up to £2,046 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
£1,479 GBP