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Herkimer Diamond - Quartz Crystal (New York) | Silicon dioxide, quartz formations, quartz crystals, dolomite, ... |
 | | Quartz crystals are a six-sided prism terminating with a six -sided pyramid at one end. |
 | | In nature, quartz crystals are often twinned, distorted, or so inter grown with adjacent crystals of quartz or of other minerals as to only show part of a individual crystals shape, these groupings of the quartz points are called crystal clusters. |
 | | Then there is the quartz crystal where a crystal has formed and then a second stage of growth/formation causes the silicon dioxide to form at the top of the crystal, extending the length of the overall crystal. |
| www.greatsouth.net /minerals/M158_Herkimer_Diamond_Quartz_Crystal.htm (870 words) |
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