Rocks and minerals have captivated the human imagination for centuries. Crystals, Rocks, and Gemstones explores the most interesting and illuminating facts about these precious treasures, from how rocks form and why gems come in different colors, to what makes a diamond valuable and why people feel a spiritual connection with crystals. Did you know that fossils made entirely out of iridescent opal have been found? Or that the ancient Egyptians believed that adorning mummies with emeralds ensured safe passage to the afterlife?  With gorgeous illustrations on every page, this covetable guide delves into the natural history, uses, and cultural significance of over 80 stones, their place in our history, and our fascination with these gifts of the earth. Perfect for lovers of nature, rock collectors, and crystal afficionados, Crystals, Rocks, and Gemstones will delight and inspire readers of all ages.