Cantera stone is a quarried, volcanic rock that's mined in various regions of Mexico and Central America.
The stone can absorb air and humidity as well without expansion, so it can be used in wet areas.
It is often used to create tables, fireplaces, wall tiles, pool areas, and columns.
The Cantera notably used in many of the buildings, walls, and roads of Oaxaca, Mexico is a distinct green color.
The ash is washed into a silt bed and combined with the lava, dirt, and stone already on the ground.