Answer:
TELL IT TO YOUR TEACHERS HOW
<span>A pearl is not a mineral because it is created artificially. It is a gemstone, not a mineral because it is a composite of mineral Aragonite and a protein compound which is called conchiolin. Pearls are formed by organic and living organisms which is preserved to become a gemstone.</span>
Off the top of my head I know there was a lot of researching by means of books. Books were where you went to find information. So nowadays you can find everything with a search engine whereas you had to go to the bookstore back then.
