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Idaho Earth Symbols

Idaho State MineralIt’s hard to imagine a better ambassador of the Gem of the Mountains.

The star garnet was designated Idaho’s official state stone or gem in 1967. With its four-rayed star (occasionally six-rayed), the star garnet is considered more precious than either star rubies or star sapphires.

Rock hounds eager to find a star garnet are advised to visit Clarkia, Idaho or India.

Fossil ˆ

Hagerman horses

Idaho’s state fossil is the Hagerman horse. The Hagerman horse lived during the Pliocene, about three-and-a-half million years ago. Though it’s much older than Ice Age fossils like the mammoth and mastodon, it’s still a baby compared to dinosaurs.

Some scientists think the Hagerman horse was more similar to a zebra than a horse. In fact, Idaho was probably similar to modern Africa during the Pliocene.

More than 200 Hagerman horses have been found in Hagerman Fossil Beds National Monument.

In 2023, Idaho adopted an official dinosaur, Oryctodromeus cubicularis. The ancient creature has been described as a small, swift herbivore. More remarkable, it apparently lived in burrows.

Idaho State Dinosaur(By FunkMonk (Michael B. H.) – Own work, CC BY-SA 3.0, link)

Soil ˆ

Named for a creek in Latah County, Threebear soil is Idaho’s unofficial state soil. Located in the mountains of northern Idaho, it is largely forested.

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