![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/1/19/Apatite-Aegirine-64416.jpg/640px-Apatite-Aegirine-64416.jpg&w=640&q=50)
Inclusion (mineral)
Material trapped inside a mineral during formation / From Wikipedia, the free encyclopedia
In mineralogy, an inclusion 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.[1] According to James Hutton's law of inclusions, fragments included in a host rock are older than the host rock itself.[2][3]
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/1/19/Apatite-Aegirine-64416.jpg/320px-Apatite-Aegirine-64416.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/8/89/Inclusions2-1.jpg/320px-Inclusions2-1.jpg)