Calabash Chalk or Calabar Stone?How do you call this in your language. In English it is identified as Calabash Chalk, in French it is called mabele, la craie or argile.In Africa, Calabash Chalk is recognized by various names: Lingala in Congo, ebumba in Uganda, and in Ghana it is known as shilè, while in zulu (South Africa) it's called umcako.