Specific weight 13.31 g/cm³
Melting point 2233°C
Mohs hardness 5.5
Element symbol Hf of hafnium (lat.)

Hafnium is a dark, greenish-silvery, lustrous, high-density heavy metal.
It is named after the Latin name of the city of Copenhagen, Hafnia, where the element was discovered. Due to its difficult extraction, hafnium is only used in small amounts. Its main area of ​​application is therefore nuclear technology.
Hafnium is very unknown and rare in jewelry making because of its extremely difficult processing methods. Since it does not react with oxygen in the air, it is particularly suitable for jewelry as it does not discolour the wearer’s skin.