From the geology course I took in 1975: Minerals are naturally occurring crystals of compound. Snow is a mineral, but volcanic glass is not. Rocks are amalgams of minerals and non-minerals.
In corpus linguistics, a collocation is a sequence of words or terms that co-occur more often than would be expected by chance. In phraseology, collocation is a sub-type of phraseme. An example of a phraseological collocation, as propounded by Michael Halliday, is the expression strong tea.
The definition of colloquial refers to words or expressions used in ordinary language by common people. An example of colloquial is casual conversation where some slang terms are used and where no attempt is made at being formal. 1  having to do with or like conversation; conversational.  informal (sense )