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.