I got these green chalcedony stones from the fellow in the booth accross from mine in Tucson a couple of years ago. He has been selling these stones as a green chalcedony. A nearby quary in Zimbabwe recently changed hands and the new owner decided that the world needed a new gem stone. So he went on a PR blitz and called this green chalceony with brown inclusions: Aquaprise. It worked sales of the stone are up.
Whatever you call this stone, its still nicely complements the red Lyons sandstone I use. I have a few slabs of the stone and would love to fit them into a table top for you. Drop me a note at Bill@WKPAccentTables.com