Sapphire clay lump is a blue-green hue. It's pretty hard to crack, and with a delicious crunch. When chewed, the clay rapidly dissolves to a pleasant consistency, containing no grains. It does not stick to the teeth and does not turn into mush. Blue clay has a very gentle and pleasant taste, resembling the classic "wet concrete floor" with the scent of wild herbs. In the end, there is a slight tart aftertaste.