What happens when you scratch minerals together to determine a minerals?

Why is the stonge age broken up in three parts? What biochemical events in quorum sensing ensure that a biofilm can function as a unit? How do spores go against gravity and fly? What factors determine company's bond rating? How can volcanic eruptions increase global temperatures? Does the current price of electricity per kWh in the UK in 2014 include standing charge and VAT? What does n stands for as abbreviation? What color eyes does Reba have? What are Commonly used gadgets based on the principle of newton law of motion? Are there any other use of alcohol other than drinking it? What do humans use fluorite for? What level of the food chain has the most energy? How many days does Venus take to make 1 orbit? Will dove dish washing liquid get ointment out of your hair? Who first composed that matter is composed of tiny indivisible particles? How do you remove nailpolish from natural stone? Where did the plague of the fourteenth century originate? What is the most common type of energy used? How do i cancel genes reunited? What fraction of elements are metals?

What happens when you scratch minerals together to determine a minerals?