Granite is light colored with large grains that eyes are visually able to see.
Obsidian is usually black but can be mixed with colors, it's smooth and has sharp edges at first.
Diorite is a coarse-grained igneous rock. Diorites color can range from nearly white to dark.
Rhyolite is a dark colored volcanic glass.
Pumice is a light colored. It is used in lightweight concrete.
Marble-lime stone is white colored.
Slate is a dark colored rock usually black or brown. The crystals in slate are not visible. This rock is hard and brittle but smooth.
Gneiss is a hard and rough rock to touch. You can see the crystals in this rock. The color of gneiss is lighter and darker parallel discontinuous bands.
Schist is hard and smooth to touch. The color is often light to dark and shiny.
Quartzite is a rock that is hard and gritty to touch. The color of this rock is white.
Coal is a black to brown colored rock. The texture of this rock is glassy to coarse fragments.
Sandstone is grey, yellow, red to white reflecting the variation in mineral contents. This rock is gritty to touch, it feels like sandpaper.
Limestone is a hard rock. The color of limestone is light colored grey or yellow. This rock can be smooth and rough.
Chert is hard and smooth to touch. Chert can be all colors. This rock looks glassy. This rock is non-classic.
Mudstone is classic and to soft to me used. It is very fine grained. This rock can have multiple colors black, white, grey, brown, red, green, blue etc.
Kailey Palmer/science7-5/Assignment: three types of rocks/date:11-22-14