Rarest And Most Valuable Opals In The World Opal is composed of small beads of silica â alpha-cristobalite â low temperature, but tightly closed in a waterproof casing. Between these âbeadsâ have cavities that contain a small amount of water.
Inorganic nutrients that facilitate growth and development in organisms include phosphorous, calcium, nitrogen, iron and fluorine. There are many different kinds of inorganic nutrients, and they are all characterized by their lack of carbon-to-carbon bonds.
What is an inorganic essential nutrient for one form of life may not be for another, though. For example, boron is an important mineral required in trace amounts that is considered essential for vascular plants and algae, but it is not considered essential for animal life, including human life.