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Round|Natural|GIA

1.00ct F I1 Round Natural Diamond

VG • F/I1 • GIA 1428408599

Certificate GIA 1428408599

Diamond specifications and retailer prices

From £1,374 GBP
HK$14,400 HKD
As of November 1, 2026
Save £2,465 GBP (64%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,838 GBP at NZ Jewellers · As of November 2, 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 I1 clarity (included), with a very-good cut grade and certified by GIA 1428408599. Listed at 12 retailers as of November 1, 2026, with prices from £1,374 to £3,838, a £2,465 spread on the same certified stone. NZ Jewellers lists it at £3,838. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
F
Colour
I1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 1428408599
Dimensions6.46 × 6.40 × 3.89 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Cavity, Crystal, Cloud, Needle, Indented Natural, Natural
Top View
6.46 mm6.40 mm1.00 ctF / I1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1428408599
Side View
Table 62.0%Crown 32°Girdle: STK-THKPavilion 41.6°Culet: NoneDepth 60.4%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: £3,838 GBP|Low: £1,364 GBP|High: £3,838 GBP|Avg: £1,927 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 1, 2026
Retailer 7£1,374 GBP
Retailer 8£1,472 GBP
Retailer 10£1,491 GBP
Retailer 14£1,502 GBP
Retailer 11£1,663 GBP
Retailer 13£1,663 GBP
Retailer 9£1,740 GBP
Retailer 12£1,919 GBP
Retailer 4£1,923 GBP
Retailer 6£1,923 GBP
Retailer 5£1,982 GBP
Retailer 3£2,185 GBP
Retailer 2£2,282 GBP
NZ Jewellers£3,838 GBP

18 data points across 14 retailers

12 retailers£1,374 GBP to £3,838 GBP

B+
Cheapest Retailer
-
£1,374 GBP
HK$14,400 HKD
B+
Retailer 2
-
£1,472 GBP
$1,975 USD
View
B+
Retailer 3
-
£1,491 GBP
$2,001 USD
View
B
Retailer 4
-
£1,663 GBP
$2,232 USD
View
B
Retailer 5
-
£1,663 GBP
$2,232 USD
View
B
Retailer 6
-
£1,740 GBP
$2,335 USD
View
B
Retailer 7
-
£1,919 GBP
$2,575 USD
View
B
Retailer 8
-
£1,923 GBP
$2,580 USD
View
B
Retailer 9
-
£1,923 GBP
$2,580 USD
View
B
Retailer 10
-
£1,982 GBP
$2,660 USD
View
B
Retailer 11
-
£2,282 GBP
€2,917 EUR
View
Most Expensive
C
NZ Jewellers
2322e5a0-8041-479e-a371-46dfcafacd32 · Nov 2
£3,838 GBP
$5,151 USD
View
11 more retailers have this diamond
Prices start from £1,374 GBPSave up to £2,465 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+
1.00ct Round
£1,374 GBP