Petoskey stone hexagonaria pericarnata is actually not a stone but fossilized coral. The term greenstone can be confusing in that it is both a rock and a mineral term.
The upper peninsula is known for its lush natural resources including the state s gemstone isle royal greenstone according to the usgs the state contains 1853 mines.
Michigan state gemstone. Michigan designated isle royale greenstone chlorastrolite as the official state gem in 1973. Michigan s state gem is as arrestingly beautiful as the lake superior shores where it s found and you won t find it anywhere else. Chlorastrolite a variety of the mineral pumpellyite is a bluish green stone with a pattern of slender star like crystals which results in a turtle back pattern.
We often hear i thought petoskey stone was the state stone the answer is petoskey stone is the state stone and greenstone is the state gemstone geology formed after hot lava flows settled and hardened about 1 billion years ago. Michigan s state gemstone pumpellyite the state gemstone is chlorastrolite a variety of the mineral pumpellyite. Made with medium michigan state gem chlorastrolite.
Official state gem of michigan. Just email us and we ll send you a coupon. Mainly found along the beaches of the great lakes and common in isle royale national park these stones are usually pebble sized and bluish green in color with a star pattern of crystals that resemble a turtle s shell.
Chlorastrolite is michigan s state gem. Michigan sterling silver ring. The 11th largest state michigan is comprised of two separate peninsulas.
In 1972 the governor of michigan signed a bill designating chlorastrolite as the official state gem. Made with large michigan state gem chlorastrolite. Get 20 off any purchase.
In prehistoric times about 350 million years ago michigan was covered by a shallow sea that teemed with coral colonies. We often hear i thought petoskey stone was the state stone the answer is petoskey stone is the state stone and greenstone is the state gemstone geology formed after hot lava flows settled and hardened about 1 billion years ago. In 1972 the governor of michigan signed a bill designating chlorastrolite as the official state gem.
My michigan 1937 the resolution passed by the michigan house of representatives specified my michigan as the official state song but this was changed upon introduction in the state senate to an official song because the state failed to purchase the copyright from the song s authors the song is rarely performed today. Minerals and gemstones found in michigan. It also goes by the common name of greenstone or isle royal greenstone.
All state rocks minerals all state fossils. Chlorastrolite a variety of the mineral pumpellyite. Also called greenstone this stone is a variety of the mineral pumpellyite.
Michigan state gem chlorastrolite. Michigan designated petoskey stone as the official state stone in 1965.
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