Anonymous

Made of gold is correct

Anonymous

Made of gold. Gold is an element. You can't get anything out of gold but gold, so you can't make something FROM gold, only OF it.

Anonymous

Made of gold (it is 100% gold and that's all there is that makes it up) Made from gold (it was made using something else that was gold) See the source link. It addresses this very question.

Anonymous

Made from gold if you started with gold. Made of gold if the thing is mostly gold now. Clearly, many things can be thought of in either way. Not an obligation though.