The different types are: Solid Formed by inorganic processes Naturally occurring Definite chemical composition Definite crystalline structure If a rock has at least three of these characteristics then it is a mineral because some of these minerals don't have the exact same characteristics.
Explanation:
1 The greatest Saharan empire cities were Timbuktu and Djenné, both of which lie on the Niger. While these empires were the most prominent Islamic states in Sub-Saharan Africa, smaller Islamic kingdoms formed to the east, such that nearly the entire northern half of the continent fell under Islamic rule.
The Peloponnesian War started between a conflict against the Athens and Greeks.
