The best depth for diamond creation is about a hundred miles beneath the Earth’s mantle. At some level, volcanic eruptions moved diamonds at these extreme depths up so they were easier to find. If you have been to discover a diamond within the dust, it will not look bright and glossy. It’s only after cutting and sharpening that diamonds look good and glowing. So, rocks are composed of a number of minerals and minerals are composed of one or more parts.
By “hefting” a rock, skilled geologists can normally guess if the rock is made up of minerals that comprise iron or lead, for example, as a result of it feels heavier than a median rock of the identical size (see our Density module for more info). A mineral is defined partially by a particular chemical composition.
Igneous rocks are shaped by the cooling and solidification of lava or magma. … Read More
