Crystals Rocks & Minerals T&K
you the chemistry of crystals and the geological science behind rock formation with more than 18 hands-on projects and investigations. Kit includes the following genuine specimens: granite, limestone, basalt, marble, pumice, calcite, pyrite, quartz, hematite, bornite, fluorite, magnetite, and soapstone. Grow three types of crystals: alum (potassium aluminum sulfate), copper(II) sulfate, and potassium hexacyanoferrate(III). Full-color, 32-page experiment manual. Ages 8 and up.