Rocks in my "new" labels, apparently:  stales, until a friend mentioned your post today, I hadn't even seen yours--and here I said I would specially watch for it.  Didn't see several surrounding it till just now, either.  Thank you.  Very nice, Sweetie--d'you know, I had a hard time deciding between quartz and mica, on account of what you say in your last two sentences.
Well, now, milum--you posted, 
- Chert, which rymes with dirt, that stands for...Pool?   I like that, but for you, I think I might change it to "Chert, which rhymes with dirt, and that stands for trouble..."


  And, it just so happens that I 
like chert.