Posted on October 29, 2012 I am continually amazed at how many of these gray stones now new on the market are stamped Ozuku. Brand new...

Posted on December 26, 2012 In the past few years I have noticed a large influx of hard gray stones marked Oozuko (Ozuko) flooding the...

Posted on January 20, 2013 There are 2 main types of layers in the Kyoto mines, and each type contains several varieties of stone. The...