Dielectric behaviors at microwave frequencies and Mössbauer effects of chalcedony, agate, and zultanite*
Paralı Leventa)†, Şabikoǧlu İsrafilb), Tucek Jiric), Pechousek Jiric), Novak Petrc), Navarik Jakubc)
       
Cross section of all minerals: (a) chalcedony, (b) agate, and (c) zultanite.