Chalk produce, and thus widely used in the developing world, calcium-based chalk can be made where the crumbling particles are larger and thus produce less dust, and is marketed as "dustless chalk". Colored chalks, pastel chalks, and sidewalk chalk (shaped into larger sticks and often colored), used to draw on sidewalks, streets, and driveways, are primarily made of gypsum. Chalk is a source of quicklime by thermal decomposition, or slaked lime following quenching of quicklime with water. In southeast England, deneholes are a notable example of ancient chalk pits. Such bell pits may also mark the sites of ancient flint mines,
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