دانلود کتاب Rocks & Minerals

Here is a spectacular and informative guide to the amazing world beneath our feet.Stunning color photographs of rocks, fossils, minerals, precious metals, crystals,jewels and gemstones give the reader a unique eyewitness insight into the evolution and composition of the Earth.See rocks that have come from outer space, stalactites as old as dinosaurs,the strange and beautiful shapes of natural crystals and priceless nuggets of gold, silver and platinum.Learn what the Earth is made of, how its rocks were formed, how early humans made the first flint tools and how diamonds and precious stones are cut, polished,and made into jewelry.Discover how prehistoric animals are preserved today as fossils, how volcanoes work,how rocks are formed from molten lava, how minerals and metals are mined and how pebbles on the seashore are worn down into sand, and much, much more.