petrified wood
Copper
Hematite
No. A mineral must be solid to be a mineral. For example, liquid water is not a mineral. Frozen water, or ice, is a mineral.
Rust
gold, silver, and copper
It is a replacement of elements or compounds in a mineral such that no alteration takes place in the form of crystal of that mineral. Replacement atoms or ions must have approximately the same size as those replaced. Replacement ions must have the same total ionic charge as those replaced. Example: Peridot (Mg,Fe)2SiO4
calciam
Calcite is an example of a carbonate mineral.
Sharp sand is an example of a silicate mineral.
No. A mineral must be solid to be a mineral. For example, liquid water is not a mineral. Frozen water, or ice, is a mineral.
Mineral.
salt
ambot
No. It is a carbohydrate. Salt would be an example of a mineral.
Opal is not a mineral, but a silica gel.
Copper.
Copper