Michigan Stromatoporoid (Sea Sponge) Fossil w/Horn Coral+Crinoid Inclusions 6LBS

Description

Michigan Stromatoporoid (Sea Sponge)
You will receive the rock pictured above.
Unpolished and Natural, smoothed by the Michigan Great Lakes.
Wet & Dry pictures of both sides are shown.
Size:  see photos
Total Weight:  6 lbs.
These 350 million year old fossils (Devonian Period) were collected in what seems to have been part of an ancient pinnacle reef or glacier moraine.
If you choose, these stones can be hand sanded and polished easily with wet/dry automotive sandpaper using... #200, #300, #400, #600, and #1200 grit.
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