The Definition of each sacred metal

Materials 

Gold~The most precious metal in the world, excellent in absorbing mantra chant and protection against evils due to its purity. 

Silver~Mainly use for creating sacred weapons for its holiness and to cleanse all evil 

Copper~Main material for creating sacred amulets which consist up to 80 % of the main element

Mercury~Strongly believed to cleansing all poisonous effect from all harmful beast etc

Lead~One of most effective material which is often used by the high attainment monk for consecrating Phra Pidta or other any other sacred objects.
One of the main material in building Chedi or ancient nails for building sacred shrines 

Tin~Often used by high attainment monk in consecrating Luang Pu Thuad that is strongly believed to protect its wearer from accidents.

Iron(Leklai)~Most mystery metals among all the materials strongly believe in enhancing metta & bring in wealth luck to his wearer 

Nickel~The main material in making coins all over the world is mainly used as the main material in rian as the Thai strongly by mixing the old ancient coin to consecrated in amulets will enhance the wearer to bring in more wealth

~Benja Loha~

Mixing of 5 precious metals to create the alloy of making the sacred object

~Sata Loha~

Mixing of 7 precious metals to create the alloy of making the sacred object

~Nawa Loha~

Mixing of 9 precious metals to create the alloy of making the sacred object