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 primarily made of ...
For example, obsidian is an amorphous glass and not a crystal. ... Pearl,
considered by some to be a mineral because of the presence of calcium ... Jet,
non-crystalline nature, organic (very compact...
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....
A mineral is a naturally occuring, homogeneous, solid with a crystalline atomic ...
however both diamonds and graphite are considered minerals, and both are ...
Coal is not a mineral, because it can not be expressed as a chemical formula, ...
Oct 11, 2006 ... A Coal is a manufactured product B Coal is NOT inorganic C Coal can exist in
liquid form D Coal doesn't have a definite chemical composition.
Dec 1, 2003 ... Re: If coal is not a mineral because it is organic, why is diamond a ... In earth
materials, it is the "mineraloids," things that look and behave like ...
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?
Coal is carbon based organic material. Mineral definition requires that material
be inorganic with a defined chemical composition and repeating crystalline ...
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 ...
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 ...