Mouthpieces rico graftonite

If you want to know, here is the answer: http://en.wikipedia.org/wiki/Graftonite.
You can find it out by Googling "Graftonite" - Simples!!

It is quite a tough material with a hardness/scratch resistance of 5 on the Mohs scale.

I like the accompanying image on that page...

240px-Graftonite_with_Triphylite_Iron_manganese_calcium_phosphate_Palermo_Mine%2C_North_Groton%2C_New_Hampshire_2863.jpg


... looks a bit basic for a mouthpiece though 🙂
 

Similar threads... or are they? Maybe not but they could be worth reading anyway 😀

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