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This is the most complete J stones listing I have found.
http://homepage2.nifty.com/s-kawai/toisi_hanbai.html

You want some stones, pick one. Courtesy of Mr. So Yamashita

Well, the other side of the coin is, to save your marriage SHE can allow you one (to begin with).

Unfortunately I learn that color and shape have little to do with the grade. You have to get in touch with someone who knows, the provenance and the stamp/label linked to it make all the difference,...

Yes, So is also taking care of me.