strange rock

I found this little guy in a parking lot.. its completely clear besides has inclusions in it, and at a certain angle you can see rainbow colors. Also looking at it from the top down it has 4 corners..when you put a light under it it illuminates immensely. Help me identify it.

Hello everybody I live in Arizona and I have a lot of strange rocks. The ones pictured may or may not have been found in Arizona as they were a garage sale find in Phoenix several months ago. I found these and others at a garage sale in a sandwich bag that was stuffed in a flower pot and both...

Found this large rock along the river on Randall's Island in NYC it stuck out among all the other rocks and I liked the way it looked so I lugged it home, has anyone came across a rock like this anywhere?