Geodes are not so pretty on the outside, but when cracked, they are beautiful on the inside. With a few materials from around the house, you can turn an ordinary egg into a geode. Materials ...

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Geodes tend to be more rounded than the rocks surrounding them. They are also harder, because the minerals within make geodes harder than the rock they are encased in. Geodes are usually spheroidal, ...

Chief meteorologist Mark Dixon participates in color-changing chemistry experiments in July 18's Science Sunday.

Using a few ingredients from around the house, you can to turn an ordinary egg into a geode. STEP 1: Crack each egg near the narrow end. Remove the shell near the top of each egg and then pour the ...