Light and dark banding exists on all three rock classifications.
Some weathered rocks have rust streaks due to the iron content in the rocks. When rocks that have ferrous iron are weathered there will be rust streaks present.
Weathered rocks with rust streaks are likely to contain iron minerals that oxidize when exposed to air and water, forming iron oxide, or rust. This process occurs over time through a series of chemical reactions, giving the rocks their characteristic rusty appearance.
Some possible rocks that can have white streaks include quartz, marble, and gypsum. White streaks can also be found in other minerals and rocks that contain light-colored minerals such as feldspar or calcite. The presence of white streaks in a rock can be indicative of certain mineral compositions.
They rarely have pores. But sometimes they get them from all the heat and pressure their put under.
Because rocks are formed by a cycle of events
Because they are to small to be considered planets.
minerals
Diamonds, emeralds, any kind of gems. These are all considered rocks.
Yes, rocks are considered to be larger, naturally occurring masses of minerals or aggregates of minerals. Stones, on the other hand, are smaller pieces of rock that have been shaped or smoothed by various natural forces like water or weathering. So while all stones are rocks, not all rocks are considered stones.
Rocks by Primal Scream :)
Made from stones, rocks. A prism.
Indians paintings on rocks.