بالنسبة للجليد وجدت التالي:
QUOTE
Definition of a Mineral:
is naturally occurring. Glacial ice is a mineral, refrigerator ice is not.
Is solid (not gas or liquid).
Has a specific chemical composition, i.e. the composition is either fixed or varies very little.
Has a characteristic crystalline structure (internal arrangement of atoms), which result in specific chemical properties.
المصدر:
http://instruct.westvalley.edu/lopez/geo_1b/lab/minerals.html