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Round|Natural|GIA

1.05ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 1558729376

Certificate GIA 1558729376

Diamond specifications and retailer prices

From £2,332 GBP
As of November 4, 2026
Save £2,956 GBP (56%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £5,288 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

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 1558729376. Listed at 16 retailers as of November 4, 2026, with prices from £2,332 to £5,288, a £2,956 spread on the same certified stone. NZ Jewellers lists it at £5,288. 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
FluorescenceFaint
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1558729376
Dimensions6.42 × 6.46 × 4.03 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
6.42 mm6.46 mm1.05 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1558729376
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.6%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: £3,055 GBP|Low: £2,194 GBP|High: £5,076 GBP|Avg: £3,010 GBP|-10.2%
Retailer 1
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
November 6, 2026
Retailer 5£2,332 GBP
Retailer 11£2,414 GBP
Retailer 3£2,613 GBP
Retailer 4£2,750 GBP
Retailer 13£2,750 GBP
Retailer 9£2,855 GBP
Retailer 2£2,991 GBP
Retailer 1£3,055 GBP
Retailer 12£3,173 GBP
Retailer 8£3,321 GBP
Retailer 14£3,435 GBP
Retailer 6£3,570 GBP
Retailer 7£3,705 GBP
Retailer 10£5,076 GBP

39 data points across 14 retailers

16 retailers£2,332 GBP to £5,288 GBP

B+
Cheapest Retailer
-
£2,332 GBP
B+
Retailer 2
-
£2,372 GBP
View
B+
Retailer 3
-
£2,414 GBP
View
Final sale: no returns
B+
Retailer 4
-
£2,613 GBP
View
B+
Retailer 5
-
£2,750 GBP
View
B+
Retailer 6
-
£2,750 GBP
View
B+
Retailer 7
-
£2,855 GBP
View
B+
Retailer 8
-
£2,991 GBP
View
B+
Retailer 9
-
£2,991 GBP
View
B+
Retailer 10
-
£3,055 GBP
View
B+
Retailer 11
-
£3,173 GBP
View
B+
Retailer 12
-
£3,321 GBP
View
B
Retailer 13
-
£3,570 GBP
View
B
Retailer 14
-
£3,705 GBP
View
B
Retailer 15
-
£5,076 GBP
View
Most Expensive
B
NZ Jewellers
9e420a83-dc25-4924-8280-fa19a2fa8ce1 · Nov 5
£5,288 GBP
$7,078 USD
View
15 more retailers have this diamond
Prices start from £2,332 GBPSave up to £2,956 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+
1.05ct Round
£2,332 GBP