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Round|Natural|GIA

1.05ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 7496000425

Certificate GIA 7496000425

Diamond specifications and retailer prices

From £1,427 GBP
As of November 6, 2026
Save £2,587 GBP (64%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £4,014 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7496000425. Listed at 18 retailers as of November 5, 2026, with prices from £1,427 to £4,014, a £2,587 spread on the same certified stone. NZ Jewellers lists it at £4,014. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 7496000425
Dimensions6.61 × 6.57 × 3.94 mm
L/W Ratio1.01
Star length45%
Lower girdle75%
Culet sizeNone
Key to symbols
Crystal, Twinning Wisp, Feather, Indented Natural, Needle
Top View
6.61 mm6.57 mm1.05 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 7496000425
Side View
Table 59.0%Crown 32.5°Girdle: THN-STKPavilion 40.8°Culet: NoneDepth 59.7%

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: £1,837 GBP|Low: £1,427 GBP|High: £3,404 GBP|Avg: £2,039 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7£1,427 GBP
Retailer 10£1,462 GBP
Retailer 8£1,571 GBP
Retailer 2£1,739 GBP
Retailer 1£1,837 GBP
Retailer 3£2,019 GBP
Retailer 9£2,151 GBP
Retailer 6£2,155 GBP
Retailer 4£2,343 GBP
Retailer 5£3,354 GBP

38 data points across 10 retailers

18 retailers£1,427 GBP to £4,014 GBP

A
Cheapest Retailer
-
£1,427 GBP
A
Retailer 2
-
£1,462 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,571 GBP
View
A
Retailer 4
-
£1,739 GBP
View
A
Retailer 5
-
£1,739 GBP
View
Retailer 6
-
£1,739 GBP
View
Price last confirmed 8 days ago
B+
Retailer 7
-
£1,820 GBP
View
A
Retailer 8
-
£1,837 GBP
View
B+
Retailer 9
-
£2,006 GBP
View
B+
Retailer 10
-
£2,006 GBP
View
B+
Retailer 11
-
£2,007 GBP
View
B+
Retailer 12
-
£2,019 GBP
View
B+
Retailer 13
-
£2,073 GBP
View
Retailer 14
-
£2,151 GBP
View
Price last confirmed 30 days ago
B+
Retailer 15
-
£2,155 GBP
View
B+
Retailer 16
-
£2,343 GBP
View
B
Retailer 17
-
£3,354 GBP
View
Most Expensive
B
NZ Jewellers
aacb2e51-d5c4-41d4-a85f-c2cbc8c4d6c6 · Nov 5
£4,014 GBP
$5,402 USD
View
17 more retailers have this diamond
Prices start from £1,427 GBPSave up to £2,587 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
£1,427 GBP