sjygreen is quite correct, faery quartz is another name for the little druzy quartz.......and they are just lovely to work with!
they are also often called magaliesburg quartz due to their south african origin, and i'm sure that the term spirit quartz comes from the spirit or acid that the miners use to clean them, rather than the type of energy that they hold.
their energy is gentle, motherly and ideal for use with emotional problems and also when working with children.
my cats also like to play with them due to the way that the light bounces and twinkles off the tiny crystals around the main crystal.
jue xx