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. Not every state has an official state mineral, rock, stone and/or gemstone, however.
In the chart below, a year which is listed within parentheses represents the year during which that mineral, rock, stone or gemstone was officially adopted as a State symbol or emblem.
Table of minerals, rocks, stones and gemstones
6 Most Valuable Gemstones Ever Found - These gemstones are the most valuable ever found. Surprisingly it's not just expensive diamonds that made the list! Ever heard of jadeite for instance...? Subscribe to World5List http://goo.gl/cpJ...
See also
- Lists of U.S. state insignia
- List of U.S. state fossils
Endnotes
References
External links
