Tenses for "hecho"...
If I'm saying that something is made of rocks, would I say "está hecho"? For that matter, what would I say to describe that something was made?
Hecho is the irregular past participle of the verb hacer =to do/to make
You cannot therefore have tenses for hecho as it is not the infinitive form of a verb
Hacer is conjugated in the present tense, as follows:(personal pronouns in brackets)
(yo) hago =I do/make
(tu) haces you(familiar form) do/make
(el/ella/ud) hace = he does or makes /she does or makes /you do (formal) or make
(Nos) hacemos =we do/ make
(Vos) hacéis = You (informal Spain only) do /make
Ellos hacen -they/you door make (formal)
As Kevin as correctly said you would say
es de algodon/seda = it is made of cotton/silk
Usually you say, "Es de...", like, "Es de piedras..." - it is made of rocks, literally "It is of rocks".
If you want to say "Made in..." you can say "Hecho en..."
As with may words 'hecho' can be used with both 'ser' and 'estar' but the meanings will ofcourse differ:
**SER plus hecho is normally used to describe an action whereas
ESTAR plus hecho normally describes a quality or the state resulting from that action.
La mesa es hecha por un carpintero y está hecha de madera.**
Another example of 'hecho' with ser
ser he·cho pa·ra - to be made for
Examples of hecho (adj) with estar and it's associated meanings:
1 terminado, acabado
Ahora nos podemos mudar, ya está hecha la casa.
2 maduro, que ha alcanzado su etapa de desarrollo
Los tomates no están hechos, no los podemos recoger.
3 [persona] que está acostumbrada a algo o alguien
Están hechos a este clima.
4 [alimento] que ya ha llegado al punto necesario de cocción
La empanada ya está hecha.
and then there are the idioms such as:
estar hecho polvo - to be worn out, exhausted
estar hecho un toro - to be as strong as an ox
You use estar for location, the present progessive tense, and something else...I can't remember now... I don't think you would use estar there...you would use the preterite tense of the verb to say something was made...If you don't know how to conjugate it in the preterite tense, use the toolbar on the top (or near the top) of the page, click more, and click "conjugator." Then type in the verb and look for preterite. Unless, or course, it's the imperfect tense...then everything changes...but that's hardly the case! Hope that helps! If it doesn't, don't hurt me!!