Minerals and Rocks

Which of the following is not a physical property used for the identification of minerals?...

What is the basic source of all minerals on the earth's crust?...

Which one of the following is the hardest mineral according to Mohs scale?...

Which of the following elements is most abundant in the earth's crust by weight?...

Which rock type is formed by the cooling and solidification of molten magma or lava?...