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Crystals can be the basis for an interesting and fun science fair project.
Crystals can be the basis for an interesting and fun science fair project.William Roesly, www.morguefile.com
Sugar crystals or rock candy are one type of non-toxic crystal you can grow yourself.
Sugar crystals or rock candy are one type of non-toxic crystal you can grow yourself.Douglas Whitaker, wikipedia.org
Table salt can produce safe, beautiful crystals you can grow at home.
Table salt can produce safe, beautiful crystals you can grow at home.from "Minerals in Your World" (USGS and Mineral Information Institute)