Crystal and Gemstone Encyclopedia

This title introduces readers to unique crystals and gemstones. The book explores natural glass formed by volcanoes, gemstones in every color of the rainbow, and crystals that grow in many shapes and sizes. Features include a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards. Encyclopedias is an imprint of Abdo Reference, a division of ABDO.