A mineraloid is a mineral-like substance that does not demonstrate crystallinity.
Mineraloids ... Pearl, considered by some to be a mineral because of the
presence of calcium carbonate crystals with...
Coal is not considered a mineral because it does not have a solid, uniform crystal
structure, meaning it doesn't fit the primary definition of a mineral. Coal is ...
If something is to be classified as a mineral, it have to fulfill the following criteria; 1
. Naturally occuring (i.e. it has to form by natural processes) 2. Stable at room ...
What's the deal with coal? ... an organic sedimentary rock, but rocks are
combinations of minerals, and minerals are inorganic. Coal is made of
decomposed plants, which are organic. ... And anyway, if coal is not a rock, what
should we call it?
Re: If coal is not a mineral because it is organic, why is diamond a mineral? Date:
Mon Dec 1 20:29:43 2003. Posted By: David Smith, Director of Professional ...
A natural snowflake would be considered to be a mineral because it forms
naturally in Earth's atmosphere. However an ice cube made in a refrigerator
would not ...
Coal, for instance, is almost totally organic (nearly pure carbon) and is not a .....
None of these minerals are considered to be major rock-forming minerals.
To be considered a mineral it must have been formed by natural geologic
processes. ... This classifies it as an organic compound and so is not a mineral.
Coal on the other hand also comes from plants (organic) and is generally
considered a ...
Traditionally and officially, native mercury is considered a mineral, even though
the metal ... The substances that make up coal, for instance, are different kinds of
Oct 12, 2015 ... Something just clicked in my head today. Rocks, by the definition I was taught,
are composed of minerals which in turn are by definition not ...