Tesaurus d'Art i Arquitectura Getty Institute 0000-00-00 2024-01-24 15:40:44 en chalk sticks300022413chalkchalk sticksticks, chalk Slender, compressed cylinders of material often made from calcium sulfate in its dihydrate form, gypsum. Most often used to write on blackboards or chalkboards in classroom contexts, but also for many other marking purposes. barras de tiza guix 2026-03-30 20:53:23