You will mostly likely either get rose or clear quartz but there are a few other kinds of quartz too.
 
Quartz (Clear) – This stone is perfect for amplifying other crystals and psychic abilities, while also aiding in focus, concentration, memory, meditation, and balance.
Quartz (Rose) – This stone is mostly used to show unconditional love and aids in self-healing, self-love, self-forgiveness, self-trust, self-worth, while dispelling negativity.