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Grinding stone

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raalf:
I want to make a prehistoric point out of a piece of jade.
I acquired some green stone supposedly jade, but not as light and transparent as the stuff you see in museums, in Yucatan Mexico.
It wasnt very expensive and I love the green.

So, now I need something to grind it on.
I saw this beautiful ancient grinding basin, and I would like my grinding basin to be just as beautiful.

What kind of stone is good for grinding my jade with Mohs hardness of 7 to shape.
I read that mostly limestone is just, and then I was wondering how it can grind the harder jade, does it have particles in itsself with more hardness?

There are some different varieties of limestone available around where I live (south of the Netherlands, near the Belgian and German borders). But which do I choose? The hardest? The coarsest?

mullet:
I started with the coarse first and then went to finer limestone. The limestone I used had sand mixed with it and I kept it wet. I hunted with the jade points the first time I hunted in South Carolina. They will get sharp.

sleek:
Jade cant be knapped?

raalf:

--- Quote from: sleek on August 07, 2018, 03:04:27 pm ---Jade cant be knapped?

--- End quote ---

I will assess the knapability, but the hear say is that its not the best to knap with.

sleek:

--- Quote from: raalf on August 08, 2018, 03:36:42 am ---
--- Quote from: sleek on August 07, 2018, 03:04:27 pm ---Jade cant be knapped?

--- End quote ---

Perhaps grind it to shape the knap the edge to get sharp? A hybrid point?

I will assess the knapability, but the hear say is that its not the best to knap with.

--- End quote ---

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