Blue stone is a generic mineral description commonly applied to a variety of minerals. Perhaps the most common reference is to the hydrated copper(II) sulfate mineral, chalcanthite. The name "blue stone" is also applicable to lazurite, the core constituent of lapis lazuli, a sulfide of sodium aluminium silicate in the sodalite group.
The term bluestone is also used for the dolerite stones at Stonehenge.
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Famous quotes containing the words blue and/or stone:
“While my hair was still cut straight across my forehead
I played about the front gate, pulling flowers.
You came by on bamboo stilts, playing horse,
You walked about my seat, playing with blue plums.”
—Li Po (701–762)
“We shall exchange our material thinking for something quite different, and we shall all be kin. We shall all be enfranchised, prohibition will prevail, many wrongs will be righted, vampires and grafters and slackers will be relegated to a class by themselves, stiff necks will limber up, hearts of stone will be changed to hearts of flesh, and little by little we shall begin to understand each other.”
—General Federation Of Women’s Clubs (GFWC)