The page on wowwiki at, http://www.wowwiki.com/Alchemist%27s_Stone, says an Alchemy Lab is required to make that item.
This page here on the Alchemy Lab says that only Mercurial Stone requires an Alchemy Lab.
- Since this page actually talks about changes with specific patch numbers, It's safe to assume this page is up to date. This is a wiki after all and requires users to actually update each individual page. User:Coobra/Sig4 06:09, 14 June 2009 (UTC)