It’s not really black, but it looks black when it enters the studio.  It dries to a light charcoal gray and, when it’s fired, comes out a dark chocolate brown. It has a high iron content, so it should not be heated in a microwave or oven because it gets hotter than other clays.  I don’t use black clay to make pots that may hold food that is heated, like coffee or soup, so you will not see any mugs or functional bowls in black clay on this site. I think that’s wisest. Most of my pottery is made using stoneware clays in a variety of colours, but you will also find some porcelain here because it is beautiful and fun to work with.