Microspherulites are tiny, round particles smaller than two millimeters in size, usually about 0.1 millimeters wide. They are mostly made of minerals, as the word "litos" in Greek means "stone." These particles form only through natural processes, not from living things or human activity. Even in water-based environments where living things might contribute, microspherulites are not formed by biological or human actions. Their round shape shows that each particle reached balance inside a liquid or gas, such as water or air.

Classification

Several types of these forms are found in nature. Depending on where they form, microspherulites can be grouped into types such as oolites, micrometeorites, impact spherulites, iberulites, pisolites, aerolites, chondrules, biolites, pellets, bubbles, or carbonaceous microspherules.