Fluid inclusion
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A fluid inclusion is a bubble of fluid that is trapped within a crystal. As minerals often form from a liquid or aqueous medium, tiny bubbles of that liquid can become trapped within the crystal, or a
Photomicrographs from Pea Ridge, MO, USA of secondary fluid inclusions in apatite (image A) and quartz (images B–H).
Inclusion (mineral)
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An inclusion in mineralogy is any material trapped inside a mineral during its formation. In gemology, it is an object enclosed within a gemstone or reaching its surface from the interior. According t
Fluid inclusion
…Melt inclusions Inclusion (mineral) Fluid inclusions - USGS…
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.