HEATKEYS

Buy Gemstones Online. Loose Semi-Precious and Precious Stones: Sapphire, Spinel, Topaz, Garnet, Tourmaline, Opal, Emerald, Ruby, Amethyst and Birthstones

Bestcrystals.com is the online Rock Shop of hundreds of crystals, minerals, fossils from around the world, from $1 to grade

On line Gemology Course, learn how to grade and identify gemstones, diamonds and colored stones. Get hands on experience using real gems.

Fine sapphire, spinel, tourmaline, alexandrite and spessartite and tsavorite garnet from the internet

natural stone information source for stone products and companies

Chemistry is the study of matter and energy and the interactions between them. Get facts for the elements in the periodic table. Find chemistry demonstrations and experiments and science fair projects. Get chemistry homework help with worked example ...

Gem Rock Auctions brings gemstone wholesales and gemstone buyers together in an easy-to-use auction marketplace. Don

Geology and Earth Science current events, news, articles, dictionary, satellite images, career information, reference maps, and more.

A reference collection of general knowledge fact sheets - one-page summaries of common subjects - biology, computer, economics, food, geography, google, internet, medicine, politics, religion, science, etc.

DuPont is a science-based products and services company. Founded in 1802, DuPont puts science to work by creating sustainable solutions essential to a better, safer, healthier life for people everywhere. Operating in more than 70 countries, DuPont of...