Igneous rocks are interesting! Most of them are also black, white or gray...do you have any different colors?
Diorite and Obsedian are my two favorite but I like them all. I think volcanos and lava are fascinating and how lave turns into hard stone is pretty neat
Obsedians are interesting! Especially the rainbow coloured ones that happen as a result of the minute inclusions of mineral crystals, rock debris or gas in them!
Rhyolite rocks are cool because they are red and that's my favorite color. Yes anything related to lava rocks are pretty cool when they transform. I guess my first love came when taking a college course in Geology. The teacher was very chipper!
Rhyolite's can also be found almost in any part of the world too!
Wow that is pretty cool. My other favorite hobby is macaroni art. Do you remember making art on paper plates? 
Macaroni arts are so old....like dating back to 30,000years! When did you start doing them?
When I was in elementary school. I thought it was neat to take food and make something creative. I am not very good at it especially after looking at some masterpieces online. 
That's interesting...you are a perfect example of how they have evolved from being something that pre-schoolers do to being popular among adults!
Yes I get some of that inspiration from online helps me to strive for something, plus a great relaxer!