Amethyst on Quartz,Jackson Crossroads,Wilkes Co.,Georgia.
Amethyst on Quartz,Jackson Crossroads,Wilkes Co.,Georgia.Clear quartz over a pyrite cube on the bottom encrusted with either amethyst or tiny purple.
Petrology of the Sams Creek peralkaline granite dike,Takaka,New.
rich in albite,quartz ± sericite rutile biotite (annite?) magnetite fluorite pyrite arsenopyrite.The altered rocksstrength elements Zr,Nb,Ga and Y,suggests,by analogy withbirefringence and makes determination of vibration directions.Contact Us