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Round|Natural|GIA

1.05ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 5426197929

Certificate GIA 5426197929

Diamond specifications and retailer prices

From £2,152 GBP
As of November 6, 2026
Save £3,757 GBP (64%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £5,909 GBP at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 1.05ct natural round diamond

This 1.05ct 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 5426197929. Listed at 19 retailers as of November 5, 2026, with prices from £2,152 to £5,909, a £3,757 spread on the same certified stone. Diamond Quarter lists it at £5,909. 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

1.05
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 5426197929
Dimensions6.55 × 6.54 × 4.02 mm
L/W Ratio1.00
Top View
6.55 mm6.54 mm1.05 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5426197929
Side View
Table 60.0%Crown 32°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 61.5%

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 6
Current: £3,523 GBP|Low: £2,016 GBP|High: £4,886 GBP|Avg: £2,948 GBP|+1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 6£2,152 GBP
Retailer 2£2,226 GBP
Retailer 8£2,413 GBP
Retailer 7£2,458 GBP
Retailer 10£2,716 GBP
Retailer 4£2,906 GBP
Retailer 9£3,092 GBP
Retailer 3£3,352 GBP
Retailer 1£3,523 GBP
Retailer 5£4,829 GBP

43 data points across 10 retailers

19 retailers£2,152 GBP to £5,909 GBP

A
Cheapest Retailer
-
£2,152 GBP
B+
Retailer 2
-
£2,413 GBP
View
Final sale: no returns
B+
Retailer 3
-
£2,456 GBP
View
B+
Retailer 4
-
£2,458 GBP
View
Retailer 5
-
£2,616 GBP
View
Price last confirmed 9 days ago
B+
Retailer 6
-
£2,616 GBP
View
B+
Retailer 7
-
£2,716 GBP
View
B+
Retailer 8
-
£2,906 GBP
View
B+
Retailer 9
-
£2,941 GBP
View
B+
Retailer 10
-
£2,959 GBP
View
B+
Retailer 11
-
£2,959 GBP
View
B+
Retailer 12
-
£3,018 GBP
View
B+
Retailer 13
-
£3,063 GBP
View
Retailer 14
-
£3,092 GBP
View
Price last confirmed 30 days ago
B
Retailer 15
-
£3,352 GBP
View
B
Retailer 16
-
£3,523 GBP
View
B
Retailer 17
-
£4,829 GBP
View
B
Retailer 18
-
£5,030 GBP
View
Most Expensive
B
Diamond Quarter
1.05SI1F5429FE07N · Nov 5
£5,909 GBP
View
18 more retailers have this diamond
Prices start from £2,152 GBPSave up to £3,757 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
1.05ct Round
£2,152 GBP