Chalk It is formed in the sea by sub-microscopic plankton, which fall to the sea floor and are then consolidated and compressed during diagenesis into chalk rock. Most people first encounter the word "chalk" in school where it refers to blackboard chalk, which was originally made of mineral chalk, since it readily crumbles and leaves particles that stick loosely to rough surfaces, allowing it to make writing that can be readily erased. Blackboard chalk manufacture now may utilize mineral chalk, other mineral sources of calcium carbonate, or the mineral gypsum (calcium sulfate). While gypsum-based blackboard chalk is the lowest cost to
Chalk carving art. In India Artist Ramita Bhaduri is the pioneer in Chalk Sculpture. For more than two decades she has used chalk to create a variety of forms and compositions. There are two types of chalk carvings. A carved object or relief consisting of one piece of chalk. A carved object or relief using two or more individual pieces of chalk. Chalk carving Chalk carving is the practice and shaping of chalk via carving . This article covers some methods, types of chalk, tools used and the benefits (and ramifications) of this material. The benefits of this material are also its