The term onyx marble refers to a dark and elegant stone with stunning veining that is often used in interior design and architecture. While onyx marble is a popular choice, there are several other synonyms to describe this type of attractive stone. Some of the common alternatives include black marble, noir marble, and obsidian marble. These stones share the same deep color and veining that onyx marble is known for, but each may have unique variations in texture and pattern. Other potential synonyms for onyx marble include jet marble, midnight marble, and ebony marble, which all carry their own associations and unique characteristics.