KGS Navigation Bar, Search, Contact, KGS Home, UK Home University of Kentucky at http://www.uky.edu Kentucky Geological Survey at http://www.uky.edu/kgs Search KGS at http://www.uky.edu/KGS/search.html contact kgs at http://www.uky.edu/KGS/about/contact.htm KGS Home at http://www.uky.edu/KGS/ UK Home at http://www.uky.edu KGS Home

KGS Home > Industrial Minerals

Cryptocrystalline: A rock texture consisting of crystals that are too small to be recognized and separately distinguished even under the ordinary microscope. (Definition from Jackson, J.A., ed., 1997, Glossary of geology [4th ed.]: Alexandria, Va., American Geological Institute, 769 p.)