What kind of stones should not be used to grind food?
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I found a pink slab of stone with a nice dip in the middle and thought of using it as a mortar for grinding spices.
Are there any stones whose makeup could potentially leach toxins?
This post was sourced from https://outdoors.stackexchange.com/q/11352. It is licensed under CC BY-SA 3.0.
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Granite, marble and jade are all common stones used for mortar/pestle combinations. There are probably many other stones that are safe, but you want to avoid the following:
- anything that is porous such as sandstone or dolomite
- anything that will break apart easily, mainly sedimentary stone
- anything that might expose you to metal toxicity such lead or cadmium
- anything with organic matter attached
- anything that reacts chemically to whatever it is you're grinding
This post was sourced from https://outdoors.stackexchange.com/a/11354. It is licensed under CC BY-SA 3.0.
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