Many people call any stone a rock; that is totally INCORRECT!!!!!! . Okay, lets call Rocks, Minerals, and Gems, just plain stones. Rocks are made… well, here I will explain the three* types of Rock, Igneous, Sedimentary, and Metamorphic:

Igneous Rocks are not exactly volcanic, molten Magma seeps to the surface, slowly cooling, giving it time to crystallize. Granite (photo #1) is a very strong, hard Igneous rock formed of Mica, Feldspar, and Quartz. In photo #2 you can see the different minerals. Obsidian is another well-known Igneous Rock.

Sedimentary Rocks are made of Minerals compacted firmly together to form rocks such as Limestone (photo 3) and sandstone.

Metamorphic Sorry, but I cannot write about this until I can get a photo of Marble



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