1. Can be identified with their
1.1. properties
1.1.1. color
1.1.1.1. it verys
1.1.2. hardness
1.1.2.1. measured with
1.1.2.1.1. Mohs hardness
1.1.3. transparency
1.1.3.1. opaque
1.1.3.1.1. translucent
1.1.4. Crystal shape
1.1.4.1. irregular
1.1.4.1.1. cubic
1.1.5. Light Reflaction
1.1.5.1. 1 image
1.1.5.1.1. 2 image
1.1.6. Acid Reaction
1.1.6.1. No Fiz
1.1.6.1.1. Fiz
1.1.7. size
1.1.7.1. it verys
2. Example
2.1. diamonds
2.2. fluorite
2.2.1. A mineral consisting of calcium fluoride that typically occurs as cubic crystals.
2.3. Calcite
2.4. Quartz
3. what types of rocks
3.1. igneous
3.1.1. examples
3.1.1.1. obsidian
3.1.1.1.1. Kimberlite
3.1.2. How they are formed
3.1.2.1. From the cooling of Magma
3.2. metemorphic
3.2.1. Gneiss
3.2.2. Examples
3.2.2.1. Marble
3.2.2.1.1. Phyllite
3.2.3. They are formed
3.2.3.1. Heat adn PResure
3.3. sedimentary
3.3.1. Coal
3.3.2. example
3.3.2.1. Coal
3.3.2.1.1. Chert
3.3.3. They can contain fossils
3.3.3.1. Fossils are often formed during the gradual layering of sediments.