A mineral is a naturally occuring, homogeneous, solid with a crystalline atomic structure. Crystallinity implies that a mineral has a definite and limited range of composition, and that the composition is expressible as a chemical formula. Some definitions of minerals give them as inorganic materials, however both diamonds and graphite are considered minerals, and both are primarily comprised of carbon, which would make them organic. So this leads me, as an engineer, to believe that mineralogists do not have a good, precise definition of a mineral, but rather a loose definition. The definition above, is the most inclusive and would include all substances currently described as minerals. The key items that make something a mineral are occurring naturally, and the definite crystal structure, that is expressible as a chemical formula. Rocks that do not meet this criteria are referred to as amorphis - not having a definite structure or expressible as a chemical formula. Some elements that occur naturally and are minerals are arsenic, bismuth, platinum, gold, silver, copper, and sulphur.

THE DEFINITION OF ORGANIC: Organic chemistry is the study of those substances containing carbon in combination with hydrogen (H), and a few other non metals, namely oxygen (O), nitrogen (N), sulfur (S) and the halogens (F2, Cl2, Br2, and I2).

Garnierite is a major Nickel (Ni) ore. Garnierite is a hydrous nickel silicate, with the serpentine group of minerals. It is an alteration of olivine, serpentine rocks, and can be associated with olivine, serpentine, chromite and talc. Garnierite is mined from laterite deposits, formed by weathering and secondary mineralization of igneous rocks. The nickel is contained in the blue-green bands of the ore in the photo. The specific gravity of this mineral ranges from 2.3 to 2.8

Nickel is ferro-magnetic, which, when used with iron and cobalt, manufactures a good strength magnet. Celestial visitors to the planet have a 5 to 20% mixture of Nickel-Iron, which distinguish them from earth rocks. Nickel is primarily used as an alloy to metals, with stainless steel being the major use of nickel. Other nickel alloys include super alloys, which are stronger and more corrosion resistant metals that are used in high temperature applications, where a particular strength is required.