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, …showed first 75 words of 1495 total…

…showed last 75 words of 1495 total…only are crystals useful in the everyday life of humans, but they are also beautiful creations of mother nature. Bibliography Works Cited American Heritage Electronic Dictionary. 3 ed. Houghton Mifflin Company. 1992 Britanica Online. vers. 98. 2. 2000. Encyclopedia Britanica. 14 May 2000. . (crystals). Compton¹s Encyclopedia Online. v3.0. 1998. Compton¹s Encyclopedia.14 May 2000. . (crystals). 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.