2 What Is a Mineral?A mineral is a naturally formed, inorganic solid that has a definite crystalline structure.All minerals contain one or more of the 92 naturally occurring elements.
3 What is a Mineral?Answer four questions.If any answer is “no” – NOT a mineral!
4 What is a Mineral? 1) Is it nonliving material? 2) Is it a solid? 3) Is it formed in nature?4) Does it have a crystallinestructure?
5 What Are Crystals? Crystals are solid, geometric forms of minerals Repeating pattern of atoms or molecules creates the crystalsA crystal’s shape is determined by the arrangement of the atoms or molecules within the crystal.
7 Two Groups of Minerals Silicate vs. Nonsilicate Silicate Minerals: Minerals that contain a combination of silicon and oxygen molecules. These minerals make up more than 90% of Earth’s crust. Examples: Quartz, Feldspar, and Mica.
9 Nonsilicate Minerals: Minerals that do not contain a combination of the elements silicon and oxygen. They are made up of carbon, oxygen (without silicon), fluorine, and sulfur. Examples; Copper, Calcite, Fluorite, and Gypsum
19 This sample of quartz shows a curved fracture pattern called conchoidal fracture.
20 Hardness A mineral’s resistance to being scratched. Scientists use Mohs hardness scale to determine the hardness of minerals.***The greater a mineral’s resistance to being scratched is, the higher the mineral’s rating is.
22 DensityThe measure of how much matter is in a given amount of space.
23 Special PropertiesSome minerals can be identified by special properties they have, such as taste (NEVER taste in science class!), magnetism, fluorescence, radioactivity, chemical reaction, and optical properties.