Russian Ammonite Quenstedticeras B tigers eye and fluorescence make calcite a

and fluorescence make calcite a desirable mineral to collect

green epidote

"Labradorescence" describes this optical property unique to labradorite

Indonesian River Jasper

Russian Ammonite Quenstedticeras B tigers eye and fluorescence make calcite aThese Quenstedticeras Ammonite come all the way from Russia. Quenstedticeras is a genus Upper Callovian (Middle Jurassic) ammonites known for their high quality, often pyritized and iridescent, fossils found primarily in Russia. These cephalopods, which lived in marine environments, are characterized by moderately evolute shells with strong, bifurcating ribs, forming a starburst pattern. Measuring 1. 4 inches in length, 1. 5 inches in height, and . 3