The Petoskey stone.
New Jersey's state rock is Glen Rock
The rose rock is Oklahoma's state rock.
Simple. There is no state rock of Virginia. A state fossil, yes (the fossil scallop, Chesapecten). A state rock, alas, no.
Delaware does not have a state rock, or a state gemstone, but the state mineral is sillimanite.
the Florida state rock is agatized coral.
No; it is the state Capitol.
The State rock of Texas is palmwood.
Alaska does not have an Official State Rock. It has Jade as the State Gem and Gold as the State Mineral.
Nevada's state rock is the Sandstone.
Georgia has a state gem or stone: quartz, and a state mineral: Staurolite. Wikipedia doesn't list a state rock as of January 2016.
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.
Oklahoma's state rock is the Rose Rock. I am positive. I am from Oklahoma.