Minerals, Crystals and Their Systems
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|An introductory listing of definitions and nomenclature concerning gem materials. Includes geometric and symmetrical properties of some gemstones, with diagrams, and major gemstones listed by crystal system.|
|Levels:||Middle School (6-8), High School (9-12)|
|Math Topics:||Higher-Dimensional Geometry, Symmetry/Tessellations, Geology|
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