Tsukurimashita would be used to say "someone made something" : [someone]は[something]をつくりました. You want to say "something is made of gold." This requires the passive form of the verb, tsukurareru (つくられる), since something is acted upon, rather than acting. Since you are using it to describe the state of something, you need to use the "te" form of this with some form of "iru." So "is made of gold" is "kin de tsukurarete iru/imasu" (金でつくられている/います).

Other examples of states expressed by -te iru (～ている):
(something) wo shitte imasu ((something)をしっています)-- know something
In Japanese, this is expressed as a state, not as an action, as in English; so one uses the "te" form of the verb shiru (しる) with some form of iru (いる).
futotte imasu (ふとっています)-- be fat
Since this expresses a state, one uses the "te" form of the verb futoru (ふとる) with some form of iru (いる).

Why not try to type all of the words in your sentences using kanji, and get corrections on all of them at once? There are usually only a couple of possibilities to choose from for any word, if you are using an input method, and you can probably guess the right one in most cases.