Join Date: Sep 2003
Location: San Francisco, CA
Regarding the stone in Riven, I'd trust Stephen. He's the one that received and marked the stones. This one was individually marked by him by price and as "Extra nice". Meaning, he probably remembers the stone.
It's very difficult to tell the difference between Ryouh and Seiryu. It think you'd have to be a geologist to know the difference. (A slight exaggeration, but not really.) I've found that the presence of white veins does not differentiate between the two. Meaning, one must study the texture of the rock as opposed to the color and markings to see the difference.