Product Description: Brazilian Slate is the absolute premium grade slate available worldwide. When referring to colour, often people use'slate grey' to describe the colour of slate. It is a dark grey, with a slight azure/blue tinge to it which turns much blacker when when or sealed. Slate needs far less maintenance than a limestone alternative and the colour is much stronger so will keep looking new for a long time without the need for constant maintenance.Slate is a strong, metamorphic rock that consists of layers that have merged together under intense pressure over 1000's of years. As a result the surface of this slate can be riven on the surface where some of the layers have broken away inconsistently, but this only adds to it's charm.