However beautiful these stones are, such beauty comes at a cost. Onyx contains calcium carbonate. Therefore, it is chalky and prone to etching, scratching and staining from acids such as ketchup, lemon, alcohol and household cleaners.
For being a soft stone onyx is best placed where it won’t be much worn, and even so, it must be sealed properly to ensure that no stains ever ruin its stunning appearance.
Nevertheless, once all is considered, there is still quite big a range of possibilities for the use of these stones, such as: wall cladding, bathtub top decks, vanities and even small islands.