Onyx marble chess and solitaire are two different types of games that can be played using a board made of onyx marble.

Onyx marble is a type of natural stone that is prized for its beautiful appearance, which includes a unique blend of colors and patterns. It is commonly used in the creation of decorative items, including chess sets and solitaire boards.

A chess set made of onyx marble typically consists of a board and pieces made of the same material. The board is typically a square or rectangular shape, with alternating squares of black and white onyx. The pieces are usually carved to represent traditional chess pieces, such as kings, queens, bishops, knights, rooks, and pawns.

Solitaire is a single-player game that is typically played using a board with pegs or marbles. The goal of the game is to remove all of the pegs or marbles from the board except for one, which should be left in the center of the board. The onyx marble solitaire board typically consists of a circular board with shallow depressions, where the marbles or pegs can be placed.

Both onyx marble chess and solitaire can be played for fun or as a way to exercise the mind. They are also often used as decorative pieces in homes and offices, thanks to their unique beauty and elegance.