Rock Cycleby Math/Science Nucleus Ages: 5 - 12Each cell, under a specific grade level contains 3 lesson plans and student worksheets. Multimedia activities, web links, and dictionaries can also be found.Subjects: earth, crust, logical, sequence, fossils, elements, minerals
Physical observations from uncut gemsby Berkeley Ages: 14+The behavior of light as it passes into a crystal depends upon the structure and chemistry of the mineral. Simple tests are used to help identify a gem...Subjects: identification, gem stones, composition, structure
Birthstonesby Amethyst Galleries Ages: 10+Here are the modern (listed first) and traditional birthstones, and in some cases their commonly recognized substitutes.Subjects: diamond, crystal, emerald, ruby, rose, quartz, garnet
Collected Information on Rock Tumblingby Alan Silverstein Ages: 14+This website exists to gather in one place all the practical advice and information I can share based on my years of rock tumbling (tumble-polishing). I started in about 1994. Why maintain this site? It's a fun hobby and I want to share the fun. Subjects: rocks, hobby, tumbling, gems, advice, tips
Collecting Rocksby Gerdus Bronn and the Silver Hills Mineral Gallery Ages: 12+The Earth is made of rock, from the tallest mountains to the floor of the deepest ocean. Thousands of different types of rocks and minerals have been found on Earth. Most rocks at the Earth's surface are formed from only eight elements...Subjects: oxygen, silicon, aluminum, iron, magnesium, calcium, potassium, sodium
