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Round|Natural|IGI

1.00ct J IF Round Natural Diamond

EX • J/IF • IGI 811689190

Shape and cutting style on the report: Round brilliant

Certificate IGI 811689190

Diamond specifications and retailer prices

From £1,287 GBP
As of November 6, 2026
Save £2,292 GBP (64%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,579 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 J colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI 811689190. Listed at 16 retailers as of November 5, 2026, with prices from £1,287 to £3,579, a £2,292 spread on the same certified stone. NZ Jewellers lists it at £3,579. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
J
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.2°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 811689190
Dimensions6.28 × 6.37 × 4.01 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.28 mm6.37 mm1.00 ctJ / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 811689190
Side View
Table 59.0%Crown 35.2°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 63.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £3,579 GBP|Low: £1,287 GBP|High: £3,579 GBP|Avg: £1,928 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
Retailer 15
November 6, 2026
Retailer 2£1,287 GBP
Retailer 11£1,467 GBP
Retailer 14£1,512 GBP
Retailer 9£1,561 GBP
Retailer 4£1,580 GBP
Retailer 3£1,707 GBP
Retailer 6£1,712 GBP
Retailer 5£1,791 GBP
Retailer 12£1,900 GBP
Retailer 10£1,962 GBP
Retailer 15£1,975 GBP
Retailer 8£2,013 GBP
Retailer 7£2,485 GBP
Retailer 13£2,991 GBP
NZ Jewellers£3,579 GBP

29 data points across 15 retailers

16 retailers£1,287 GBP to £3,579 GBP

A
Cheapest Retailer
-
£1,287 GBP
A
Retailer 2
-
£1,467 GBP
View
A
Retailer 3
-
£1,512 GBP
View
A
Retailer 4
-
£1,561 GBP
View
A
Retailer 5
-
£1,580 GBP
View
Final sale: no returns
A
Retailer 6
-
£1,707 GBP
View
A
Retailer 7
-
£1,712 GBP
View
A
Retailer 8
-
£1,733 GBP
View
A
Retailer 9
-
£1,791 GBP
View
A
Retailer 10
-
£1,900 GBP
View
A
Retailer 11
-
£1,962 GBP
View
B+
Retailer 12
-
£1,975 GBP
View
A
Retailer 13
-
£2,013 GBP
View
B+
Retailer 14
-
£2,485 GBP
View
B
Retailer 15
-
£2,991 GBP
View
Most Expensive
B
NZ Jewellers
ae31ed70-5468-4f17-8e74-24f0cd9eaf8c · Nov 5
£3,579 GBP
$4,817 USD
View
15 more retailers have this diamond
Prices start from £1,287 GBPSave up to £2,292 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
£1,287 GBP