Is it a Mineral?

              

Today, I went out in the hills behind my house to try and find some mineral examples and there were just as many cool rocks as I remembered there being when I was little. Among the Limestone, shale, and other rocks we found a few good ones. Here are some the treasures from this excavation (little dramatic word since we picked them up off the dirt trail leading up the hill):

Farthest left: there seems to be some sort of crystalline structured mineral on a rock. Almost seems to be a partial piece of a geode that had been broken up. 

Back right: shows some fun sedimentary lines that seem almost rusted which makes me wonder if it has striations of iron or some other metallic element that has a chemical reaction with water and air to create Rust. Also, may be a sheet silicate with how smoothly the layers would break off. Although I fount it interesting that it broke off perpendicularly from the sedimentary lines. 

Front left & right:  These are what I would deem to be the closest to Quartz or feldspar group with a white, semi-iridescent/glossy pieces in the column-like formation down the left side of the front one. The back sample is a much brighter purer white with specks of the iridescence, I wonder if that means that it has a higher silica content from the other sample. Although they could have just different Tetrahedron structures. Here are some up close videos: 

We also found a seashell fossil which low-key looks like it is inside of dinosaur poop! Its so interesting to see how many different minerals and rocks that can be present in a small area. This is one of the many things I find so interesting about geology. 

Overall some fun discoveries!