rocks and a promise

I first thought to make entry categories after rocks and minerals, in keeping with the general geogeek tone. Then I thought that was silly and confusing. Now I think I like it again, but I could use some suggestions.

So far (and these are all real rocks/minerals):
• hornblende – band/music stuff
• gneiss – links that are charming and don’t make me angry or frightened
• apatite – food and beverages
• garnet! – mild-mannered griping
• analbite – not-so-mild-mannered griping
• staurolite – astronomy and celebrity gossip
• adularia – fan letters, warm fuzzies
• andalusite – if you haven’t seen Un Chien Andalou, you really should. then you would understand why this category is for dreams.
• geode – honest-to-god geogeeky stuff
• angelite – random acts of charity
• banalsite – what i had for breakfast and other matters of pressing importance
• blende – miscellaneous
• blue vitriol – rants that I probably won’t care about in the morning
• blushing copper – the ones where i talk about my nipples
• brimstone – religion
• calamine – silly tests, the Friday Five and other itches you’ve just gotta scratch
• campylite – i love kitsch!
• coprolite – pure shite
• hiddenite – entries you’re not allowed to see
• jargon – the overly technical
• mimetite – street performance art
• perlite – CGI scripts, or programming/design issues generally
• sardonyx – heaps of scorn and mockery
• serpentine – snakes and other twisty things
• specularite – wild guesses
• tripolite – issues of etiquette
• tuff – what does not kill me will make me stronger
• ultralite – super-duper fluffy posts, and pedal-powered airplanes
• till – agriculture

…and of course I’ve got waay too many categories, some content overlap, and a few that are just there for sake of the pun. Pretty please, email me your favorite 5-10? Or any other categories that need rock names, or rock names that need categories, or just a big ol’ ball of derision if you think this idea is silly.