To what kind of stone creature or character is turned with petrification or flesh to stone type spells?
The Petrified condition is the result of various monster abilities
A Petrified character has been turned to stone and is considered unconscious. If a petrified character cracks or breaks, but the broken pieces are joined with the body as he returns to flesh, he is unharmed. If the character's petrified body is incomplete when it returns to flesh, the body is likewise incomplete and there is some amount of permanent hit point loss and/or debilitation
The flesh to stone spell reads:
The subject, along with all its carried gear, turns into a mindless, inert statue. If the statue resulting from this spell is broken or damaged, the subject (if ever returned to its original state) has similar damage or deformities. The creature is not dead, but it does not seem to be alive either when viewed with spells such as deathwatch.
Only creatures made of flesh are affected by this spell
Is it one of the sedimentary stone types (came from organic elements) or some other like igneous or metamorphic?
And to which subtype of stone are they turned?
More on stone types on https://en.wikipedia.org/wiki/List_of_rock_types