Calcium sulfate an unusual property: when mixed with water at normal (ambient) temperatures, it quickly reverts chemically to the preferred dihydrate form, while physically "setting" to form a rigid and relatively strong gypsum crystal lattice: This reaction is exothermic and is responsible for the ease with which gypsum can be cast into various shapes including sheets (for drywall), sticks (for blackboard chalk), and molds (to immobilize broken bones, or for metal casting). Mixed with polymers, it has been used as a bone repair cement. Small amounts of calcined gypsum are added to earth to create strong structures directly from cast earth, an
Pointed Sticks stick" might be more useful than defending against fresh fruit. They chose this name after discovering that their first six choices had all been taken. At the beginning of their career they were briefly known as "Ernie Dick and the Pointed Sticks". Pointed Sticks Pointed Sticks are a Canadian punk rock/new wave band from Vancouver. Originally active from 1978 to 1981, then reuniting to perform in July 2006 through to November 2012. After a three-year hiatus, Pointed Sticks returned to the stage in June 2015 for shows on Vancouver island as well as the July 11th Khatsahlano street party in