White Opal (cabochon and rough)
John Betts - Fine Minerals
Large oval cabochon of transparent colorless White Opal with broad brilliant flashes of color from green to pink (internal fire), accompanied by a sample of rough Opal from the same deposit.
570 km north of Addis Ababa, Wello (Wollo), Delanta Plateau, Tigray, Ethiopia.
22 x 16 x 9 mm cab.; 22x20x15 mm rough