Oren wrote:
On Tue, 17 Jan 2012 19:57:22 +0000 (UTC), Chuck Banshee
wrote:

On Tue, 17 Jan 2012 11:02:38 -0800, Oren wrote:

We call this Flagstone in my area.

OK. I'll call it flagstone!

See this video for tips: (but use safety glasses)
http://www.youtube.com/watch?v=05uTflMbWBs

Now that was interesting!

His brown (sand?) stone looks exactly the same as mine.
http://www3.picturepush.com/photo/a/...mg/7364581.gif

The scoring was trivial! He took his rock chisel and simply
scratched a line. Just one line. That was it. It wasn't even a
complete line. I'm amazed that 'thin' scratched line did anything!


I think his scribe was mainly for visual purposes, not intended to
really "score" the stone. You can tell how soft the stone is in the
video.

I wonder if that will work for circles (to make the sprinkler head
fit)? http://www1.picturepush.com/photo/a/...40/7364584.gif

Sandstone is very soft. I would find a hole / coring bit to drill the
hole. A star bit was mentioned above, but I think using one
(hammering) would break the stone along a weak fault in the stone.

Try finding an inexpensive (?) diamond tipped core bit of the proper
size for the sprinkler head.

I'd bet a metal hole saw, like for creating extra openings in a
circuit-breaker box, would work. They go up to 2+ inches and are not
expensive.

Why are we sprinkling flagstone?