Probably not, but I don't think anyone has proved that it was.
they think it was built too keep the gods from diying
For information about the building and possible use of Stonehenge see related links below, or google'Solving Stonehenge' for the latest research.
Probably the Beaker People around 2400 to 2300 BC
some say that cavemen built it around the 100 BC. but that's a myth (maybe)
The major stones of Stonehenge are mostly sandstone, others are igneous rocks.