water
Hardness and streak color are very important. The color of the mineral helps some, as well.
For Health e.g. calcium and iron.
Iron, Fe2+
Olivine is the most common mineral in the Earth's mantle.
Gold and salt
Coal is Pennsylvania's most important mineral. The state has a long history of coal mining, and coal has been crucial to its economic development.
Carbonates are the second most important mineral group.
mineral oil
Calcium is the most important mineral for healthy bones, especially for women.
Gold is one of the most important minerals in California due to its historical significance in the state's economy and culture. Additionally, California is also known for its production of industrial minerals such as sand, gravel, and cement, which play a crucial role in construction and infrastructure development.
Gravel
Calcium
Gold
Silicates
Bauxite
It is gold.
Pyrite, iron sulfide is a common mineral in many rocks. Pyrite is the most important sulfur-containing mineral.