Curated OER
Crystals
Students investigate patterns in solids, the structures of crystals and rocks made up of minerals. In this crystals lesson plan, students review solids, make patterns with Styrofoam balls, make crystals in the lab and observe their...
Jewelry Central
Jewelry Central: Amethyst
Information on this commercial site gives the physical properties and origin of the amethyst, as well as some of the mythical and metaphysical properties ascribed to the gemstone.
Royal Society of Chemistry
Chemical Society: Zirconium
This site, which is provided for by the Chemical Society, gives a short descriptive entry on zirconium.