A mineral habit is the one of all mineral characteristics that should, and often is, considered first (I didn't start the list with it because it's only obvious for someone experienced). To identify minerals, it is very important to know which minerals grow crystals-not all do.
Tear down this wall! Tear down this wall! is a line from a speech made by US President Ronald Reagan in West Berlin on June 12, 1987, calling for the leader of the Soviet Union, Mikhail Gorbachev, to open up the barrier which had divided West and East Berlin since 1961.
Earlier in the day Reagan had looked across the wall into East Berlin from a balcony of the Reichstag. He later said that his forceful tone had been influenced by his learning that East German police had forced people away from the wall to prevent them from hearing his speech over the loudspeakers.