Black Terrazzo Tiles with Flake Patterns
They are terrazzo tiles which are black and have randomly scattered black and white flakes. The shiny quality gives its the appearance of ceramic or porcelain texture.

The SBSAR file permits users to change the colors of tiles and flakes, the amount and ratio of tiles, edge wear, dirt level etc.
 
Typical Orange or Brown Leather Texture with Impressions
This texture has classical leather patterns which are tiny flakes with various colors ranging from red, orange to brown.

Besides gaps between flakes, there are also a few big impressions.

Dirt appears on the texture too.