Inclusion (mineral)
In mineralogy, an inclusion is any material that is trapped inside a mineral during its formation.
In gemology, an inclusion is a characteristic enclosed within a gemstone, or reaching its surface from the interior.
According to Hutton's law of inclusions, fragments included in a host rock are older than the host rock itself.
Read more about Inclusion (mineral): Mineralogy, Gemology
Famous quotes containing the word inclusion:
“Belonging to a group can provide the child with a variety of resources that an individual friendship often cannot—a sense of collective participation, experience with organizational roles, and group support in the enterprise of growing up. Groups also pose for the child some of the most acute problems of social life—of inclusion and exclusion, conformity and independence.”
—Zick Rubin (20th century)