Focus On Minerals

FOCUS ON MINERALS introduces

many common minerals and their

gems. Texts and illustrations explain the physical properties useful in identifying different minerals. Th ey include crystal structure (shape), color, streak (mineral powders), luster (appearance in refected light), hardness, cleavage (breaks along

planes of weakness) and others. Precious gems and gemstones hold significant interest throughout our history. Humans advanced their standard of living and culture by progressive uses of ore

minerals and industrial minerals. Each of thirty plus minerals named in the book appears in a glossary with photograph and description.