Quartz    Minas Gerais, Brazil. Ex. Harold L. Dibble collection. A 10.4 x 6 x 5.3 cm single crystal. Healed surfaces, no damage. Front very nice with secondary quartz that is glassy and slightly smoky over an original, ugly, crystal. Muscovite sticking out on one side in lower region of crystal. Stands for display. Nice. $250