Sorry...that seemed to be the implication i was getting with the concept of the combination of earth iron and meteorite being a marriage of Earth and Sky.
You wrote:
The usage of metal was very important, because of the yin element of it. Together with the usage of meteor material,was literaly the "marriage" of sky(meteor) and the earth(iron).
Metal working itself seems pretty yang to me though i do suppose as an inanimate object
any metal could be considered yin.