Mineral Identification

The most commonly known of the Quartz mineral group is Amethyst . It has the most value, and its purple color is due to iron and aluminum impurities. It is translucent and has a vitreous luster. Brazil is the leader in amethyst production. Amethyst are found in Geodes. Geodes are former air bubbles created by volcanic activity in which mineral rich water moving from the outside of the rock into the center causes crystals to form.

Peridot is a form of Olivine, consisting of Iron and Magnesium.  The Iron causes its green color. Peridot is an igneous rock formed deep in the mantle, and brought u p to the surface by volcanic activity. 

Feldspar is a common mineral found Earth. It makes up nearly 60% of Earth's crust. Feldspar is formed by cooling magma. It is a major component of Granite.

Mica is composed mostly of silicon and oxygen. There are many variations of Mica, including Biottie and Muscovite. Mica is distinguished by its many thin layers. Most of the flashes seen in granitic rocks are Mica. 

Limestone is a sedimentary rock formed of calcium carbonate. Limestone originates in warm sea waters where organisms, who are able to produce calcium carbonate, die and form and accumulate into limestone.

Pyrite, for most people, is known as Fool's Gold. It's an iron sulfide mineral that can be found in many rock types including, Igneous, Sedimentary, and Igneous rocks.