Crystals
Crystals
What is a crystal? A crystal is a solid substance with definite geometric shapes and molecules that are arranged in a repeating pattern (Compton¹s ). Crystals have fixed angles between its faces, which have distinct edges. If the faces of a crystal can reflect light, then it will sparkle (Stangle). Crystals have constant angles because of the regular arrangement of its particles. There are seven types of crystals: cubic, tetragonal, orthorhombic, hexagonal, trigonal, monoclinic, …
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…only are crystals useful in the everyday life of humans, but they are also beautiful creations of mother nature.
Bibliography
Works Cited
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Compton¹s Encyclopedia Online. v3.0. 1998. Compton¹s
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³Crystals.² Compton¹s Encyclopedia. 1969 ed.
Dr. Boyle. ³ Frequently Asked Questions about Crystals for Students.² 14 Aug. 1998 .
Growing Crystals. .
Stangle, Jean. Crystals and Crystal Gardens You Can Grow. New York. 1990.
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