Large Natural Clear Quartz Sphere from Diamantina, Brazil (11 lb)High Grade Diamantina Quartz Crystal Sphere with Natural Rainbows This large clear quartz sphere is a high grade Diamantina specimen, carved from exceptional quartz sourced in Diamantina, Brazilan area once known for diamond mining and now celebrated worldwide for producing some of the clearest quartz crystals in existence. Inside the sphere, natural internal features create beautiful flowing patterns, forming numerous rainbows that appear easily as