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Round|Natural|IGI

1.64ct J IF Round Natural Diamond

EX • J/IF • IGI 683598427

Shape and cutting style on the report: Round brilliant

Certificate IGI 683598427

Diamond specifications and retailer prices

From £2,955 GBP
$3,959 USD
As of October 30, 2026
Save £2,948 GBP (50%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £5,903 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.64ct natural round diamond

This 1.64ct natural round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI 683598427. Listed at 15 retailers as of October 30, 2026, with prices from £2,955 to £5,903, a £2,948 spread on the same certified stone. NZ Jewellers lists it at £5,903. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.64
Carat
J
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.9°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 683598427
Dimensions7.55 × 7.49 × 4.70 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.55 mm7.49 mm1.64 ctJ / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 683598427
Side View
Table 57.0%Crown 35.9°Girdle: MediumPavilion 40.9°Culet: NoneDepth 62.4%

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: Oct 30
Current: £4,165 GBP|Low: £2,867 GBP|High: £5,461 GBP|Avg: £3,693 GBP|+2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 11£2,955 GBP
Retailer 9£3,019 GBP
Retailer 10£3,127 GBP
Retailer 2£3,205 GBP
Retailer 4£3,360 GBP
Retailer 3£3,388 GBP
Retailer 5£3,509 GBP
Retailer 6£3,627 GBP
Retailer 8£3,801 GBP
Retailer 1£4,165 GBP
Retailer 7£5,425 GBP

41 data points across 11 retailers

15 retailers£2,955 GBP to £5,903 GBP

A
Cheapest Retailer
-
£2,955 GBP
$3,959 USD
A
Retailer 2
-
£3,019 GBP
$4,045 USD
View
A
Retailer 3
-
£3,127 GBP
$4,190 USD
View
Final sale: no returns
A
Retailer 4
-
£3,205 GBP
$4,295 USD
View
A
Retailer 5
-
£3,360 GBP
View
A
Retailer 6
-
£3,388 GBP
$4,540 USD
View
A
Retailer 7
-
£3,388 GBP
$4,540 USD
View
A
Retailer 8
-
£3,388 GBP
$4,540 USD
View
A
Retailer 9
-
£3,509 GBP
View
A
Retailer 10
-
£3,627 GBP
€4,629 EUR
View
A
Retailer 11
-
£3,801 GBP
View
A
Retailer 12
-
£3,909 GBP
$5,238 USD
View
A
Retailer 13
-
£4,165 GBP
ZAR 90,150 ZAR
View
B+
Retailer 14
-
£5,425 GBP
View
Most Expensive
B+
NZ Jewellers
584521c7-ea5c-464a-8124-cdb2117cf189 · Oct 30
£5,903 GBP
$7,909 USD
View
14 more retailers have this diamond
Prices start from £2,955 GBPSave up to £2,948 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
1.64ct Round
£2,955 GBP