We have crash landed in 500BC, during the time of the Ancient Greeks, and our time machine is not able to fly again.
We needed to build some shelters and we knew the Greeks used stone for their buildings. We had 5 different samples of rocks and we also had descriptions of them from our database. But we had to match them up!
Which stone would you use for the foundations of your house? Which would you use for the walls? Which would you use for the roof?
A good answer will talk about the properties each stone had and why they are suitable for the job.