Unpolished, quality Petoskey stones are available at an average of around $4 per pound. This price is for about 2-5 stones per pound. Some online sites charge up to $10 for a pound of raw, unpolished, small stones–up to seven stones to a pound.

Hexagonaria percarinata

around 350 million years ago

The acidity of the vinegar will help dissolve excess particles, revealing the tiny crevices of the fossil.

To polish a Petoskey stone by hand, start with a file to smooth the stone or do any other rough shaping. When you have the shape you want, sand with a 220 grit. Hold the dampened stone firmly in one hand and rub the area of the stone to be polished on the sandpaper with a steady, rotating motion.

The Charlevoix stone is a Favosite which have a smaller coral-esq pattern and a lighter or white color set of small rays radiating from the eye forming the characteristic hexagonal shape which are lighter and they don’t always attach to the center dot.

Is there a difference between a Charlevoix and Petoskey stone? Yes, there is a difference between a Charlevoix and Petoskey stone. The Charlevoix stone has a smaller exoskeleton compared to its cousin the Petoskey stone. It’s not uncommon to find both of these unique fossils while exploring area beaches.

All of these Great Lakes rocks and fossils are full of history and beauty can all be found on our regional coastline! From patiently searching for a Lake Superior agate, to finding a beach on Lake Michigan that is full of Petoskey stones, cool and exciting rocks can be found in every one of the Great Lakes.

collectors. Composed of calcite, the Petoskey stone is actu- ally a Devonian-age fossil coral with a distinctive hexagonal. pattern consisting of small six-sided chambers in which cor- als once lived approximately 350 million years ago when the.

Petoskey stones can be polished with a Dremel tool. You will need sanding pads from 50-1500 grit along with a buffing/polishing wheel for achieving the desired finish. If you are starting with a rougher stone, you will need to make sure its surface is free of dirt that may cause unwanted scratches.

The Leland Blue Stone is actually slag – a waste product from the smelting process used in the late 1800s by the Leland Lake Superior Iron Company.

Depending on the shape the stone is in when you start, this project could take you all day. If it’s in pretty good shape, it only take half a day. What you’ll need: Silicon carbide wet or dry sandpaper: 220, 400 and 600 grit (I couldn’t find 600 grit, so I used 800 grit instead)

So, what is a Petoskey stone? It is a fossil colonial coral that lived in the warm Michigan seas during the Devonian time around 350 million years ago.

The “Yooperlites” were discovered by Erik Rintamaki in 2017. He was credited with the find and is now selling them for $32 per pound.

The rocks, which he named “Yooperlites” emit an eerie glow, appearing to be partially molten rock. Rintamaki, a gem and mineral dealer, made this discovery after hunting for rocks in Michigan’s Upper Peninsula, bringing with him a black light.