Inclusion (mineral)

In mineralogy, an inclusion is any material trapped inside a mineral during its formation.

The analysis of atmospheric gas bubbles as inclusions in ice cores is an important tool in the study of climate change.

[5] Many colored gemstones are expected to have inclusions which do not greatly affect their values.

They are categorized into three types:[2] The term "inclusion" is also used in the context of metallurgy and metals processing.

The term is usually used negatively such as when the particle could act as a fatigue crack nucleator or as an area of high stress intensity.

Dark inclusions of aegerine in light-green apatite
Sketch showing different shapes of inclusions
An insect encased in amber , has gas bubbles protruding from its thorax and head.
The term three phase relates to the three phases of matter, solid, liquid, and gas. This is a three phase inclusion in rock crystal quartz. The solid is a black material that is of bituminous origin. The liquid encased is petroleum , and the gas bubble is methane .