Minerals can consist of elements or compounds.. Example Galena PbS and Pyrite FeS 2 Native Minerals consist of only one type of element.. Rock Forming MineralsThe rock cycle suggest
Trang 1Difference Between a Rock
and a Mineral
Rock
1) Occur in nature
2) Inorganic
3) Solid
4) Definite chemical composition 5) Definite molecular structure
A rock is a consolidated mixture of one or more minerals
Ex Granite and Basalt.
In some cases a pure mineral may also be classified as a rock.
A mineral must satisfy the following conditions;
Trang 2What is a Mineral?
Minerals can consist of elements or compounds Majority are compounds Example Galena (PbS) and Pyrite (FeS 2 )
Native Minerals consist of only one type of element Examples include Gold, Silver, Sulfur, Diamond, Copper.
A naturally occurring inorganic solid with a definite chemical composition and molecular structure.
Trang 3Rock Forming Minerals
The rock cycle suggest that ALL rock types originally started as igneous rock (solidified magma).
Igneous rocks form from Eight minerals called the
rock forming minerals.
1) Olivine
2) Pyroxene
3) Amphibole
4) Biotite Mica
5) Plagioclase Feldspar 6) Orthoclase Feldspar 7) Muscovite Mica
8) Quartz
Trang 4What is a Rock?
Rocks are generally composed of more than one mineral For example, Granite consist of;
Quartz, Feldspar, Hornblende and Mica.
An Aggregate of minerals.
Quartz
Orthoclase Feldspar Amphibole
Trang 5Some common rocks include;
Granite, Rhyolite, Basalt, Gabbro, Andesite, Diorite, obsidian, Pumice, etc
Marble, Slate, Gneiss, Schist, Phyllite, etc
Conglomerate, Sandstone, Shale, Limestone, etc
Trang 6Sample Problem
Citing two differences, distinguish between a rock
and a mineral.
Answer:
Chemical elements are the building blocks of minerals
whereas minerals are the building blocks of rocks
Minerals are pure solids, where all the molecules have the same definite chemical composition and
structure,whereas rocks are a mixtures of minerals often appearing multi-colored.