So I got this stainless steel ring but I took it to this place and apparently its not stainless it's aliminum bc of how light it is but it's really hard so how could it be aluminum?
Aluminum is a quite soft metal, but so is gold. It is true that aluminum is light in weight but magnesium is even lighter and is common enough that a ring could be made of it. Metals can be made harder by adding small amounts of other metals or even by the way it is heat treated. .
