Minerals
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Geologists use many mineral properties to identify minerals and better understand the rocks they are studying. more...
When minerals are too small to see with the naked eye, a microscope can be used to identify them based on optical properties unique to each mineral. more...
It was believed that the first rocks on Earth formed during the Archean Eon, between 3.9 and 2.5 billion years ago. Recent discoveries suggest older rocks. more...
Minerals that are susceptible to breaking down during erosion processes are less likely to end up in sedimentary rocks. Tougher minerals are common. more...
Metamorphism of rocks is a result of a sedimentary, igneous or other metamorphic rock being subjected to heat and pressure. more...
The mineral composition of igneous rocks contain mostly the elements oxygen and silicon, but many other elements form a variety of minerals in igneous rocks. more...
Geologic Secrets of Stonehenge
Along with all the archeological questions of why or how Stonehenge exists is the geological question of where the rocks came from. more...
All feature articles in Minerals
By: Molly Markey
Minerals are natural crystalline substances with distinct chemical compositions. Knowledge of minerals is the foundation of geology, the study of rocks and of the Earth. more...
Diamonds – the World's Most Valuable Gemstones
By: Scott Hayden
Treasured for centuries as symbols of extreme wealth and power, diamonds are made of pure carbon and come from deep within the earth's crust. more...
By: David Katski
Stunning vistas, fascinating geological features and a large selection of obsidian makes Glass Buttes a stimulating environment. more...
Evolution in the Mineral Kingdom
By:
Kelly Whitt
Minerals evolved along with the solar system and more so on Earth due to the presence of life, which helps scientists in the search for extraterrestrial life. more...
By: Isaac M. McPhee
Sedimentary rock formations are those which are formed by layer upon layer of sediment being laid down by natural forces. It is the stone in which history is hidden. more...
By: Isaac M. McPhee
Metamorphic rocks are those which change type over time and under certain conditions. They are proof that rock may not be as stable and permanent as it seems. more...
By: Isaac M. McPhee
Igneous rocks are formed from lava (or magma), though they are not easily definable, as they exist in over seven hundred varieties. more...
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