News‎ > ‎

Omya Mine Field Trip, March 19th, 2011

posted Mar 22, 2011, 11:11 AM by Hi-Desert Rockhounds
Our big March field trip took the Hi-Desert Rockhounds to the White Knob Quarry of the Omya Mine in Lucerne Valley. At the mine office, Howard Brown the Omya Mine Geologist gave us a very informative powerpoint presentation and talk before taking us rockhounds up the mountainside. Although the quarry is mostly calcium carbonate, pure-white calcite crystals, lots of other minerals, some fluorescent, were to be found within easy reach. Limestone crystals masses with rhodochrosite inclusions, epidote, garnet, wollastonite, sphalerite, aragonite minerals and in other areas cooper ore minerals like chrysocolla, azurite, malachite. We even found galena and pyrite. With so much material laying about, it soon looked like a pickup truck bed filling festival free for all. Some very impressive yard rocks were taken home. Some talk was overheard for another Omya collecting return trip, maybe a summertime, nighttime ultraviolet fluorescent field trip.