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Chlorastrolite, also known as Isle Royale Greenstone, is a green or bluish green stone. [1] Chlorastrolite has finely radiating or stellate (for examples, see crystal habits) masses that have a "turtleback" pattern. The stellate masses tend to be chatoyant, meaning they have a varying luster. This chatoyancy can be subtranslucent to opaque.
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Leaders of states in the U.S. which have significant mineral deposits often create a state mineral, rock, stone or gemstone to promote interest in their natural resources, history, tourism, etc.
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Mesolite is a tectosilicate mineral with formula Na 2 Ca 2 Si 9 Al 6 O 30 ·8H 2 O.It is a member of the zeolite group and the natrolite subgroup, [4] also resembling natrolite in appearance.