Simply because - their rarity, and process of refining makes them expensive metals. Owning gold or platinum jewellery implies the wearer has an amount of wealth.
petroleum refining is petroleum refining
"Infringe" is an anagram for refining.
A Precious Metal Refining Company.
It separates crude oil into fractions consisting of compounds with similar properties
artificial jewellery
This is a chemical engineering process - the refining of petroleum.
North Atlantic Refining was created in 1994.
Refining Fires was created on 1915-01-18.
United Refining Company was created in 1902.
The population of United Refining Company is 4,387.
refining your taxes are really good . thats a good sentences try this to: refining taxes saves you alot of money