AZ-Mtnman said:dj, that isn't bull quartz, you can tell from the iron staining in it. Another thing to look at is the matrix on that piece, not something associated with bull quartz. The thing to remember is that even tho there is iron present, it won't oxidize and stain the quartz if it isn't exposed to air. Just from the pic, I'd have to guess the lode isn't too far away, but in a relative term since that piece has obviously traveled some, but only shows a few years of staining.