Dear Bob: John Carmichael recently subscribed to this group using this address. Unfortunately, the day after he left on a week long trip. He is a sundial maker who works in Coconino Flagstone. (That's in Arizona) The colors vary from a pinkish to an amber to almost a white. He has found that the stone wears well, and the light shades are perfect for shadow casting.
He carves the stone by hand using diamond burs (bits) - obtained from almost any lapidary or jewelry makers shop. The key is to make the cut deep enough, and the stone at least a couple of inches thick. When he returns I'll share these e-mails with him, but already I know he is looking forward to sharing questions and ideas. Good Luck - Phil Pappas for John Carmichael