Round|Natural|GIA

1.03ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 6455666038

Certificate GIA 6455666038

Diamond specifications and retailer prices

From £2,514 GBP
$3,369 USD
As of November 1, 2026
Save £2,222 GBP (47%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,934 GBP at NZ Jewellers · As of September 28, 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 GIA 6455666038. Listed at 14 retailers as of November 1, 2026, with a 88% 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

1.03
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6455666038
Dimensions6.38 × 6.43 × 4.01 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Culet sizeNone
Key to symbols
Crystal, Cloud, Natural
Top View
6.38 mm6.43 mm1.03 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6455666038
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £2,725 GBP|Low: £2,396 GBP|High: £4,793 GBP|Avg: £3,133 GBP|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 8£2,514 GBP
Retailer 2£2,608 GBP
Retailer 7£2,614 GBP
Retailer 9£2,709 GBP
Retailer 1£2,725 GBP
Retailer 5£2,917 GBP
Retailer 10£3,033 GBP
Retailer 3£3,300 GBP
Retailer 6£3,481 GBP
Retailer 4£4,736 GBP

41 data points across 10 retailers

14 retailers£2,514 GBP to £4,736 GBP

B+
Cheapest Retailer
-
£2,514 GBP
$3,369 USD
B+
Retailer 2
-
£2,608 GBP
$3,495 USD
View
B+
Retailer 3
-
£2,614 GBP
$3,502 USD
View
Final sale: no returns
B+
Retailer 4
-
£2,709 GBP
$3,630 USD
View
B+
Retailer 5
-
£2,725 GBP
View
Retailer 6
-
£2,832 GBP
$3,794 USD
View
Price last confirmed 32 days ago
B+
Retailer 7
-
£2,917 GBP
View
Retailer 8
-
£2,941 GBP
$3,940 USD
View
Price last confirmed 33 days ago
Retailer 9
-
£3,033 GBP
A$6,253 AUD
View
Price last confirmed 24 days ago
Retailer 10
-
£3,267 GBP
$4,378 USD
View
Price last confirmed 33 days ago
B+
Retailer 11
-
£3,300 GBP
€4,211 EUR
View
B
Retailer 12
-
£3,481 GBP
ZAR 75,348 ZAR
View
B
Retailer 13
-
£4,736 GBP
View
Most Expensive
NZ Jewellers
496021fe-891f-47ba-a52f-36089d12cec4 · Sep 28
£4,934 GBP
$6,611 USD
View
Price last confirmed 35 days ago
13 more retailers have this diamond
Prices start from £2,514 GBPSave up to £2,222 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.

B+
1.03ct Round
£2,514 GBP