Calcite is transparent to opaque and may occasionally show phosphorescence or fluorescence. A small amount of manganese is enough to make it glow bright red under some wave lengths of ultraviolet light.
Amethyst is a violet variety of quartz often used in jewelry. Amethyst occurs in primary hues from a light pinkish violet to a deep purple. Amethyst may exhibit one or both secondary hues, red and blue. The best varieties of amethyst can be found in Siberia, Sri Lanka, Brazil and the far East.
Welcome to the Kettle Moraine Geological Society
a non-profit organization dedicated to the knowledge of earth sciencesIt’s coming faster than you think! Mark your calendars. We are expecting another fantastic show. Again, the 2019 57th annual Rock, Gem & Earth Science show will be held at the Washington County Fair Park & Convention Center; 3000 Hwy. PV on March 9 & 10, 2019. “Learn More” below.
