Kidney stones are solid deposits of minerals that can form in the kidneys, also known as renal calculi. They can be made up of various types of crystals, with the most abundant crystal determining the ...

There are about 6,000 different types of minerals, but only a couple hundred are gemstones. Learn more about these special minerals and how someone like you can find your own gemstone. Science Trek is ...

Add Yahoo as a preferred source to see more of our stories on Google. ROLLA, Mo. – Scientists in Missouri are actively pursuing dozens of minerals, including rare ones, that have been found across the ...