I collect rocks and minerals. Both purchased (eBay auctions, mineral shows) and by personally collecting them here on hikes in Colorado.
If anyone shares this hobby and wants to trade, send me a PM. I have collected a lot of blue amazonite from the Pikes Peak region, rough purple and green fluorite, rose quartz and black tourmaline (schorl). And I also have a lot of purchased specimens of all kinds that sit piled in cardboard flats that I'd rather see enjoyed instead of gathering dust.