Difference between revisions of "Geode"
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| − | [[Image:geode.gif]]A '''geode''' [[Mineral Aggregates|mineral aggregate]] is a rounded, hollow [[nodule]], lined with [[crystals]], usually [[quartz]] or [[calcite]]. [[Amethyst]] is an example of a [[mineral]] exhibiting a geode form.<ref>Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987) p. 40</ref> | + | [[Image:geode.gif|right]]A '''geode''' [[Mineral Aggregates|mineral aggregate]] is a rounded, hollow [[nodule]], lined with [[crystals]], usually [[quartz]] or [[calcite]]. [[Amethyst]] is an example of a [[mineral]] exhibiting a geode form.<ref>Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987) p. 40</ref> |
==References== | ==References== | ||
Revision as of 16:18, May 10, 2007
A geode mineral aggregate is a rounded, hollow nodule, lined with crystals, usually quartz or calcite. Amethyst is an example of a mineral exhibiting a geode form.[1]
References
- ↑ Chesterman, Charles W. The Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf: New York (1987) p. 40