Most caves have enough openings to allow air movement, which does evaporate some of the moisture and causes the precipitation of calcite and aragonite from the seeping waters. Nature creates formations in a cave very slowly. It may take one hundred to one hundred fifty years to form an inch of material to the speleothems. These speleothems may take the form of icicles, trees, statues, or the delicate design of lacy flowers. The coloration of these structures varies from white or cream, to yellowish or dark brown which is due to the presence of limonite that is dissolved from the overlaying rocks. The red and orange hue comes from dissolved iron mixing with water to form iron oxide. The blue is derived from manganese. "Cave onyx" is made up of a variety of calcite. It has a banded, rich brown appearance. Speleothems that are white are almost pure calcite. The color variations and the configurations of the cave’s gradual deposits create the beautiful wonderland of this under explored area of our earth.