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Geology

Quartz Spears

Quartz and Silica Minerals Gallery

Quartz crystals generally terminate in blades, not true points. Many pointed rock-shop "crystals" are cut and polished quartz.
The real thing
Photo (c) 2007 Andrew Alden, licensed to About.com (fair use policy)

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Gallery Index: Quartz and Silica Minerals Gallery

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