Blue stone is a generic mineral description commonly applied to a variety of minerals. A mineral is a naturally occurring substance formed through geological processes that has a characteristic chemical composition a highly ordered atomic structure and specific Perhaps the most common reference is to the hydrated copper(II) sulfate mineral, chalcanthite. Copper(II sulfate is the Chemical compound with the formula Cu[[Sulfur S]] O 4 Chalcanthite, whose name derives from the Greek chalkos and anthos, meaning copper flower is a richly-colored blue/green water-soluble Sulfate The name "blue stone" is also applicable to lazurite, the core comstituent of lapis lazuli, a sulfide of sodium aluminium silicate in the sodalite group. Lazurite is a tectosilicate mineral with Sulfate, Sulfur and Chloride with formula (NaCa8(AlSiO46(SO4SCl2 Sodalite is a rich royal blue Mineral widely enjoyed as an Ornamental stone. The term bluestone is also used for the dolerite stones at Stonehenge. Bluestone is the name given to several stones (1 a feldspathic sandstone in the U Diabase (ˈdaɪəbeɪs or Dolerite is a Mafic, Holocrystalline, Igneous rock equivalent to Volcanic Basalt or plutonic Stonehenge is a Prehistoric Monument located in the English county of Wiltshire, about west of Amesbury and north of Salisbury

Other uses of the name blue stone may refer to blue-grey building stone or paving material. In Australia a bluish variety of basalt is widely used for building. Basalt (bəˈsɔːlt ˈbeisɔːlt ˈbæsɔːlt is a common Extrusive Volcanic rock.

The name should not be confused with blue john, which is a blue/purple variety of fluorite, also known as fluorspar, found in Derbyshire, England. Fluorite (also called fluorspar) is a Mineral composed of Calcium fluoride, Ca[[Fluorine F2]] Fluorite (also called fluorspar) is a Mineral composed of Calcium fluoride, Ca[[Fluorine F2]] History The area that is now Derbyshire was first visited probably briefly by humans 200000 years ago during the Aveley Interglacial as evidenced by a Middle