What is Onyx?

Onyx is a type of chalcedony, which is a form of quartz, and it is known for its layered, contrasting colors. It is made of microcrystalline quartz, formed in the voids of cooling volcanic lava. It is characterized by its parallel bands of color, which contrast sharply with one another. These bands can occur in various colors, including white,blue, black, brown, red, and green.

What is Onyx Marble

Appearance and Varieties: The most common variety of it is black onyx, which may have white bands. Onyx can also be found in other colors, like red, brown, and green. The bands can range from nearly invisible to quite pronounced.

Historical Significance: Has been used since ancient times for making ornaments, amulets, and in various decorative arts. It was particularly prized in ancient Greece and Rome.

  • A translucent variety of the mineral chalcedony, often with parallel bands of different colors like white, brown, green, or red.
  • Not technically a true marble, but often used in similar decorative applications due to its beauty and ability to transmit light.
  • Can be backlit for striking visual effects.


  • A metamorphic rock composed mainly of calcite or dolomite, usually with a crystalline texture and varied colors and patterns.
  • Opaque and doesn’t transmit light.
  • Widely used for construction and decorative purposes.