Yes, but not in the way that living things grow. Crystals are not composed of cells.
Crystal's grow by a process called nucleation.
yes
NO
there are materials inside of the crystal to help them grow
A small quartz crystal can grow about 1mm a week assuming it is in a stable matrix.
a nucleus or plural nuclei
A crystal
how cold?
no
sugar
with salt and bioling water
actually, water is made up of 2 hydrogen molecules and 1 oxygen molecule. (h2o) therefore, you cannot GROW a water crystal.