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The state rock of Pennsylvania is the trilobite. Actually, the trilobite is the state FOSSIL of Pennsylvania. PA does not have a state rock or a state mineral yet, though suggestions have been made.
No State mineral, there is a State Gem that may fall into that category though, fossilized wood, weirdly enough.
The state "gem" in the Lake Superior Agate. I am not sure there is a "Sate mineral" though iron ore has played a major role in Minnesota's history and economy due to the Iron Range in the Northern part of the state.
The web address of the Houston Gem And Mineral Society is: http://www.hgms.org
Opal and amber are not minerals.
North Dakota does not have a state rock nor mineral nor gem.
It has no official state rock, stone, gem or mineral.
It has no official rock, stone, gem or mineral.
The is no official rock, stone, gem or mineral for Pennsylvania.
what is the name of the state stone in delaware
It has no official state rock, stone, mineral or gemstone.
Hawaii does not have a state mineral, but it's state gem is black coral.
Alaska does not have an Official State Rock. It has Jade as the State Gem and Gold as the State Mineral.
As of 2014, Maryland does not have an official state rock. However, the state does have the Patuxent river stone as the official gemstone of the state.
The state rock of Pennsylvania is the trilobite. Actually, the trilobite is the state FOSSIL of Pennsylvania. PA does not have a state rock or a state mineral yet, though suggestions have been made.
There is no Official Rock, Mineral or Stone but it does have the Patuxent River Stone as the Official Maryland State Gem.
Georgia has a state gem or stone: quartz, and a state mineral: Staurolite. Wikipedia doesn't list a state rock as of January 2016.