So it will take about 13 years to become a psychiatrist, perhaps more if you do nto already have a bachelor's degree (4 years). ::::::::::::::::::::::::::::::::::::::... Source(s): http://wiki.answers.com/Q/How_long_does_... OR Â· 8 years ago. Thumbs up.
Other uses of onyx are wall panels, home floors, tables, and sink base. Onyx can be used as a novelty item. These items include vases, wine goblets, urns, bowls and lamps. It has incredible uses wherein it can accent the stone.t is heated in order to intensify the colour of the onyx. Onyx can be completed with a surface that is polished, just like a marble. It has a reflective and silken base finish, which deepens the colour of the stone and the contrasts.
Onyx is a type of marble and should be treated accordingly. It should be sealed on a regular basis in wet areas, and cleaned with a stone cleaner or mild detergent. If possible, onyx should be squeegeed or toweled dry to help prevent staining or etching of the stone.