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Round|Natural|GIA

1.05ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 7553989852

Certificate GIA 7553989852

Diamond specifications and retailer prices

From £1,840 GBP
As of November 6, 2026
Save £567 GBP (24%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £2,650 GBP at Blue Nile · As of October 27, 2026
View at Blue Nile

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 7553989852. Listed at 6 retailers as of November 6, 2026, with a 31% 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

1.05
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 7553989852
Dimensions6.44 × 6.48 × 4.03 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Needle
Top View
6.44 mm6.48 mm1.05 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7553989852
Side View
Table 57.0%Crown 35.5°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,650 GBP|Low: £1,840 GBP|High: £2,712 GBP|Avg: £2,376 GBP|-2.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 2£1,840 GBP
Retailer 3£2,368 GBP
Retailer 5£2,407 GBP
Retailer 4£2,569 GBP
Blue Nile£2,650 GBP

45 data points across 5 retailers

6 retailers£1,840 GBP to £2,407 GBP

A
Cheapest Retailer
-
£1,840 GBP
Retailer 2
-
£2,288 GBP
View
Price last confirmed 12 days ago
Retailer 3
-
£2,368 GBP
View
Price last confirmed 10 days ago
B+
Retailer 4
-
£2,407 GBP
View
Retailer 5
-
£2,569 GBP
View
Price last confirmed 11 days ago
Most Expensive
Blue Nile
29980862 · Oct 27
£2,650 GBP
$3,547 USD
View
Price last confirmed 10 days ago
5 more retailers have this diamond
Prices start from £1,840 GBPSave up to £567 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
£1,840 GBP