Cubic or Isometric - not always cube shaped! You'll also find octahedrons (eight faces) and dodecahedrons (10 faces).
Tetragonal - similar to cubic crystals, but longer along one axis than the other, forming double pyramids and prisms.
Orthorhombic - like tetragonal crystals except not square in cross section (when viewing the crystal on end), forming rhombic prisms or dipyramids (two pyramids stuck together).
Hexagonal - six-sided prisms. When you look at the crystal on-end, the cross section is a hexagon.
Trigonal - possess a single 3-fold axis of rotation instead of the 6-fold axis of the hexagonal division.
Triclinic - usually not symmetrical from one side to the other, which can lead to some fairly strange shapes.
Monoclinic - like skewed tetragonal crystals, often forming prisms and double pyramids.
or these are like formed types of crystals
Synthetic bismuth crystal
Gallium, a metal that easily forms large single crystals
monocrystal of potassium dihydrogen phosphate