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Round|Natural|GIA

1.00ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 1559987010

Certificate GIA 1559987010

Diamond specifications and retailer prices

From £1,308 GBP
As of November 6, 2026
Save £2,742 GBP (68%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,050 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 1559987010. Listed at 14 retailers as of November 5, 2026, with prices from £1,308 to £4,050, a £2,742 spread on the same certified stone. NZ Jewellers lists it at £4,050. 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
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1559987010
Dimensions6.41 × 6.39 × 4.00 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Indented Natural
Top View
6.41 mm6.39 mm1.00 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559987010
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.5%

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: £4,050 GBP|Low: £1,308 GBP|High: £4,050 GBP|Avg: £2,206 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
November 6, 2026
Retailer 7£1,308 GBP
Retailer 6£1,586 GBP
Retailer 8£1,588 GBP
Retailer 2£1,837 GBP
Retailer 9£1,860 GBP
Retailer 10£1,897 GBP
Retailer 3£1,937 GBP
Retailer 5£1,937 GBP
Retailer 13£1,972 GBP
Retailer 12£2,026 GBP
Retailer 11£2,045 GBP
Retailer 4£3,399 GBP
NZ Jewellers£4,050 GBP

27 data points across 13 retailers

14 retailers£1,308 GBP to £4,050 GBP

A
Cheapest Retailer
-
£1,308 GBP
A
Retailer 2
-
£1,586 GBP
View
A
Retailer 3
-
£1,588 GBP
View
A
Retailer 4
-
£1,837 GBP
View
A
Retailer 5
-
£1,860 GBP
View
A
Retailer 6
-
£1,872 GBP
View
A
Retailer 7
-
£1,897 GBP
View
A
Retailer 8
-
£1,937 GBP
View
Retailer 9
-
£1,937 GBP
View
Price last confirmed 8 days ago
A
Retailer 10
-
£1,972 GBP
View
A
Retailer 11
-
£2,026 GBP
View
A
Retailer 12
-
£2,045 GBP
View
Retailer 13
-
£3,399 GBP
View
Price last confirmed 11 days ago
Most Expensive
B
NZ Jewellers
6264d278-0ac1-4cc1-ba5e-a9c4b8e8aaaa · Nov 5
£4,050 GBP
$5,421 USD
View
13 more retailers have this diamond
Prices start from £1,308 GBPSave up to £2,742 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
£1,308 GBP