First baseline study of garnet and epidote chemistry in mineralized and barren porphyry-skarn ... and by Rio technical staff. Training in rock petrography and mineral analysis will be mainly completed ...

Lake Superior’s shoreline is awash with the tiny pieces of garnet, the birthstone for January. Garnets are often thought of ...

Just a few minerals make up most of the rocks we see, though: feldspars, amphiboles, quartz, olivine, garnet, micas, calcite, and pyroxenes. The possible combinations of these minerals are endless.

“We have rock, mineral, fossil, gem and shell specimens ... New for the 2024 sale are samples of garnet in the volcanic rock called rhyolite. They are from Garnet Hill near Ely.