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National Geographic Science and Space Home Page.

Groundbreaking developments in science, space, technology, health, and the environment

Birthstone Chart, List of Birthstones For Each Month, How Gemstones are Formed

Fact Monster is a free reference site for students, teachers, and parents. Get homework help and find facts on thousands of subjects, including sports, entertainment, geography, history, biography, education, and health.

American cut sapphires, rubies, emeralds, tanzanites, aquamarines, garnets, tourmalines, peridots, apatites and zircons from San Diego, California

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Ellen Steiber

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Discover education resources and information, lesson plans, field trips, and fun interactive activities for educators, families, and students. All based on Smithsonian museum collections and research.

WEB-PLATFORM FOR THE GEMS, JEWELRY AND RELATED INDUSTRIES. SELLING AND BUYING SUPPORT FOR LOOSE DIAMONDS, PRECIOUS AND SEMI-PRECIOUS STONES. QUALITY CONTROL FOR LOOSE DIAMONDS, PRECIOUS AND SEMI-PRECIOUS STONES BEFORE SETTING AND FINISHED PRODUCTS BE...

All About Moldavite Crystals