5 Magnificent Creations Of Mother Nature That Will Amaze You! (11/15)

Tourmaline is classified as a semi-precious stone . The gemstone comes in a wide variety of colors, from light to dark ones. This is the pink one, that has green outer layer. It reminds of a watermelon . This gem is used for jewelry. The largest tourmaline piece, included in The Guinness World Records measured 36.44 x 33.75 x 21.85 mm and weighing 191.87 carats.