Simplify the following text for a Grade 10 native English-speaking person.
Original: More generally in construction , specifically the dimension stone trade , the term `` marble '' is used for any crystalline calcitic rock ( and some non-calcitic rocks ) useful as building stone .
Simplified: In the construction trade , the term `` marble '' is used for any massive , crystalline calcitic rock ( and some non-calcitic rocks ) useful as building stone .