Earth sustains growth in its ultimate form and is good, friable soil. It may be solid but still can be broken and settles down to its old patterns. It harbors life and holds heat quiet well. It is the building material of everything we do. It is a reference point in a changing world and rarely changes though it can be rearranged.
It can be much more movable, soft and pleasant to touch, less sustaining and a child can just push it around. It can be whipped up by the wind so it flies through the air and can even melt under intense heat to take a completely different form. However, it can also be very unmovable and ultimately stubborn as set in its ways and uninterested in anything else sort of element.
Earth can be carved to reflect other things but with lot of effort. Its ultimate form of rock is gemstones and diamond is its most prized as are precious metals. Its heart is still rock, inactive, unchanging, dull to some and beautiful to those prepared to look closely to see the veins the flow through it.
Another trait of earth is that it is also everything solid. It can be tress and plants, concrete and metals, or bricks and plastic. It goes through various changing process which can be slow and sometimes very dramatic. It can be so extremely useful in so many ways when transformed. It sustains us with shelter we call home, provides us steps for other things to pass along or through pipes for waters, cable for electricity or roads for vehicles.
It can be our food, our clothes, our weapons or our excrement. It can also be the computer you are using right now. However, it needs something else to bring it to life. It is solid, not easily moved, weighty and tangible.
Source : http://www.gotohoroscope.com/zodiac-chart-key-words.html