A Geoscience Digital Image Library

TitleQuartz, jasper
DescriptionJasper is a variety of chert, which is the general term applied to granular cryptocrystalline quartz (SiO2) varieties. It is thought to form by the replacement of calcareous rock by silica-rich solutions and by direct marine precipitation of silica gel or organic silica. Jasper is commonly associated with interbedded hematite ore deposits of Precambrian age.
LocationUSA ▹ Arizona. Near Cave Creek.
PhotographerDarla Sondrol. 2002-03-22.
CollectionWard’s Classroom Collection of Gem Minerals #15.
Key wordsjasper, quartz, Arizona
Tech details324 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number2520