What is the official state gem of Washington?

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. read more

Petrified wood is also a state symbol of Texas and Mississippi (the state stone), and of Arizona, North Dakota and Louisiana (official state fossil). All State Gems - All State Fossils. Petrified Wood in Washington State. In prehistoric times, the interior of Washington was swampy with trees such as cypress, oak, elm and gingko. read more

Listing of all the official state rocks, minerals, gemstones for the 50 states, in order by state. read more