Take these words for example:
木{もく}造{ぞう}: made of wood; wooden
and
金{きん}製{せい}: made of gold
I have been under the impression that -製
is used for where an item has been manufactured (i.e. Made in Japan; Made in America), or the manufacturing of a certain product (i.e. iron manufacturing, etc.). I also thought that -造
was for what material something is made out of. Flipping through my dictionary it seems -製
is more common than -造
for referring to the material used (e.g. 鋼製: made of steel
).
Is there a rule about which materials use -造
and which use -製
? Is it just something one has to learn?