One of only a few pyrite/ Japan law twin combination specimens I was able to get. Japan law twins from Huanzala are unheard of-- this mine has produced literally thousands of tons of specimens over the last 40+ years, though Japan Law twins are virtually unknown from there. I certainly haven't seen any, and my (much more experienced) middle aged friend in Peru who has been specializing in Huanzala material since his early teens had never seen one before either.
This one has saw marks on the reverse/ side and the twin is a bit more hidden, so it's a bit cheaper than others I have posted-- still, it's a beautiful combination, and these pyrite quartz/ combos have never been especially abundant from Huanzala.