The first three photos are close ups of Michigan Greenstone, our state gem. Chlorastrolite is a green or bluish green stone that has finely radiated or stellate masses that have a "turtleback" pattern. The stellate masses tend to be chatoyant, meaning they have a changeable luster. This chatoyancy can be subtranslucent to opaque. Chlorastrolite is a variety of pumpellyite: Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2·H2O. Chlorastrolite was once thought to be an impure variety of prehnite or thomsonite.
Here is a close up of rough greenstone.
Here is a close up picture of Michigan float copper. This specimen has some oxidized portions.
An agate from out west...
The following specimen is a close up of a moss agate.
Another agate....
And a bumble bee...
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