Which is the ugliest rock and the ugliest mineral, in your opinion?
For me carbonates (limestone and dolomite) are the drabbest of all rocks. I know they tell an interesting story (ie coral reefs etc) but carbs just leave me cold. As far as minerals go - anything fine grained and homogeneous is generally boring. Give me some crystals, banding and vivid color. I love labradorite and the pleochroism of the feldspar crystals. Also the pleochroism of argonite on ammonite fossils (ammolite gemstone). But to tell the truth I have never met any rock or mineral I didn't like.
I've seen a lot of hematite samples which basically look like poop.
A cast iron skillet (or other cooking device). I'm not is that counts as BIG or not.
well screws, rods,manholes