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Meaghan Novlan

on 24 September 2012

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Transcript of Minerals!

Quimette C.
Zach Cameron
Meaghan Novlan
Elizabeth Richards
Jazmine Lopez Minerals What are Minerals? How Minerals form: Crystallization from magma, Precipitation, changes in pressure and tempurature, formation from hydrothermal solutions. Crystallization from magma: as magma starts cooling it starts forming, it starts forming minerals. as minerals continue forming, the composition of the magma changes, then minerals rich in sodium, potassium, and aluminum form. Precipitation: Lakes, rivers, ponds, oceans, and beneath its surface contain many dissolved substances. And when water evaporates, some dissolved substances can react to form minerals. Changes in water temperature might cause substances to precipitate out of a body of water. Tempurature & pressure: Increase in pressure can cause minerals to recrystalliize while still solid. Changes in temperature can cause certain mineralses to become unstable, under these conditions, new minerals form that are stable to the new condition. Hydrothermal Solution: Is a very hot mixture of water and dissolved. It has temperatures between 100*C and 300*C. When the solutions come into contact with existing minerals, chemical reactions take place to form new minerals. Natural Occuring All gemstones are considered minerals.
Synthetic gems are not minerals, because they MINERAL GROUPS SILICATES: CARBONATES: are minerals thats contain the elements carbon, oxygen, and one or more other metallic elements. silicates
sulsates sulsides
native elements EX: Calcite
(CaCO3) OXIDES: are minerals that contain oxygen and one or more other elements, which are usually metals. EX: Haematite
(BaSO4) are minerals that
contain the
element sulfur HALIDES: Quartz Feldspar Muscovite Hornblende are not formed by naturally geologicly. Atoms or ions arrange in an orderley manner.

An Opal is not a mineral even though it has the same elements as Quartz. are minerals that
contain a halogen
ion plus one
or more other
elements. EX: fluorite
(CaF2) NATIVE ELEMENTS: are minerals that only contain one element or type of atom. EX: diamond
(C) Sulfide EX: Realgar
(AS4S4) A salt in which the anion contains both silicon and oxygen, esp. EX: Anion
(Si042) MINERALS: Minerals are an important part
of our daily lives.

For example, glass is made from the mineral,
quartz and pencil lead is made from
the mineral, graphite. QUESTIONS




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