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Round|Natural|GIA

1.00ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 6551742033

Certificate GIA 6551742033

Diamond specifications and retailer prices

From £1,818 GBP
As of November 4, 2026
Save £2,312 GBP (56%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £4,129 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6551742033. Listed at 24 retailers as of November 4, 2026, with prices from £1,818 to £4,129, a £2,312 spread on the same certified stone. NZ Jewellers lists it at £4,129. 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

1.00
Carat
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle34°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 6551742033
Dimensions6.38 × 6.41 × 3.98 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Top View
6.38 mm6.41 mm1.00 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6551742033
Side View
Table 58.0%Crown 34°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.3%

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 4
Current: £4,129 GBP|Low: £1,709 GBP|High: £4,129 GBP|Avg: £2,589 GBP
NZ Jewellers
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 10£1,880 GBP
Retailer 3£1,923 GBP
Retailer 9£2,084 GBP
Retailer 4£2,147 GBP
Retailer 6£2,147 GBP
Retailer 11£2,230 GBP
Retailer 13£2,321 GBP
Retailer 12£2,331 GBP
Retailer 2£2,437 GBP
Retailer 5£2,477 GBP
Retailer 7£2,587 GBP
Retailer 14£3,419 GBP
Retailer 8£3,952 GBP
NZ Jewellers£4,129 GBP

38 data points across 14 retailers

24 retailers£1,818 GBP to £4,129 GBP

A
Cheapest Retailer
-
£1,818 GBP
A
Retailer 2
-
£1,855 GBP
View
A
Retailer 3
-
£1,868 GBP
View
A
Retailer 4
-
£1,880 GBP
View
Final sale: no returns
A
Retailer 5
-
£1,923 GBP
View
B+
Retailer 6
-
£2,084 GBP
View
Retailer 7
-
£2,147 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£2,147 GBP
View
B+
Retailer 9
-
£2,193 GBP
View
B+
Retailer 10
-
£2,230 GBP
View
B+
Retailer 11
-
£2,321 GBP
View
B+
Retailer 12
-
£2,331 GBP
View
B+
Retailer 13
-
£2,331 GBP
View
B+
Retailer 14
-
£2,437 GBP
View
B+
Retailer 15
-
£2,443 GBP
View
B+
Retailer 16
-
£2,443 GBP
View
B+
Retailer 17
-
£2,477 GBP
View
B+
Retailer 18
-
£2,525 GBP
View
B+
Retailer 19
-
£2,587 GBP
View
Retailer 20
-
£2,750 GBP
View
Price last confirmed 14 days ago
B+
Retailer 21
-
£2,781 GBP
View
B
Retailer 22
-
£3,419 GBP
View
B
Retailer 23
-
£3,952 GBP
View
Most Expensive
B
NZ Jewellers
e25de996-62fb-4b0e-a36f-a7ab26d1ca9b · Nov 5
£4,129 GBP
$5,527 USD
View
23 more retailers have this diamond
Prices start from £1,818 GBPSave up to £2,312 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
1.00ct Round
£1,818 GBP