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.
The presence or absence of carbon is what differentiates organic nutrients from inorganic nutrients. Carbohydrates, lipids, proteins and vitamins have carbon in their structure, making them organic. Water and minerals do not, so they are inorganic. Nutrition 101: Science of Nutrition / Science Courses.
These amendments can be both organic or inorganic. Organic types, like worm castings, decay into the surrounding soil to add nutrients, although not as much as a typical fertilizer. Inorganic amendments, like gypsum, help water infiltration throughout the topsoil but do not contribute any nutritional benefits.