(李时珍曰.石者.气之核.土之骨也.大则为山岩.细则为砂尘.其精者.为金为玉.其毒者.为 为砒.气之凝也.则结而为丹青.气之化也.则液而为矾汞.是以禹贡周官.列其土产.农经轩典.详其性功.亦www.med126.com/jianyan/良相良医之所当注www.med126.com/Article/意者也.)