Anyone have the chemical breakdown for Ashinuma Ishi ?

[Guest JBaymore]

Tough question here:

 

Does anyone have a typical analysis chemical breakdown for Ashinuma Ishi (also known as Aka-ko)? [This is the original stone that forms the basis for the Mashiko Kaki (persimon) glaze.] I have a good "look alike" using US materials but want to see the original chemistry, if I can. I don't want to go to the expense of having some of the already ground rock that I have on-hand analyzed at a lab (if I can help it). Plus my stock of the stone is getting low... and it is not something that I want to use up too fast .

 

Thanks in advance for any help.

 

best,

 

................john

[Guest JBaymore]

Got the answer from John Neely... so no longer needed ... thanks.

 

best,

 

...............john