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.
The most important inorganic phosphate is calcium phosphate, Ca3(PO4)2. It makes up the larger part of phosphate rock, a mineral that is abundantly distributed throughout the world. Ca(H2PO4)2, is a compound produced by treating rock phosphate with sulfuric acid or phosphoric acid, or a mixture of the two.