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).

It's primary use is cosmetics, it is highly absorbent and has been used in pharmaceutical applications.

Hectorite (from the Hector Mine) has a lithium concent of 1.2%. The Hectorite deposits in California were probably formed by hydrothermal activity. The clay was a alteration of volcanic ash or tuff in restricted alkaline lakes, heated by hot spring activity. Hectorite deposits are controlled by fault zones, giving the hot water access to the ash.

A typical analysis of Hectorite is SiO (53.95%), Al2O3 (0.14%), Fe2O3 (0.03%), Na2O (25.98%), K2O (3.4%), LiO2 (1.2%), H2O+ (5.61%) and H2O- (9.29%).