Muscovite: Muscovite from Mitchell County, North Carolina. Muscovite sheets have a pearly to vitreous luster on their surface. (Myers et al., 1974). Muscovite is found in igneous, metamorphic, and sedimentary rocks. CHIPPEWA COUNTY: Occurs along bedding planes and in argillites interbedded with the Flambeau quartzite, as exposed in SE sec. ), Muscovite. 5 T.23N. Specimen is approximately 2 1/4 x 2 x 1 1/2 inches (5.9 x 4.8 x 3.4 centimeters). paints, ceramic glazes, and cosmetics. Muscovite is found in igneous, metamorphic, and sedimentary rocks. The use of ground mica is mainly determined by activity levels of the construction and auto industries. Mica has several properties that make it suitable for very special uses: 2) the sheets are chemically inert, dielectric, elastic, flexible, hydrophilic, insulating, lightweight, reflective, refractive and resilient, 3) it is stable when exposed to electricity, light, moisture and extreme temperatures. It is easily recognized because of its perfect cleavage that allows it to separate into thin, transparent, flexible sheets. Some of the pink muscovite is lithium enriched. It can also improve mechanical properties by increasing R.4E. (Campbell, 1981). IOWA COUNTY: Muscovite in the form of sercite is formed locally in the mineralized zone of the Demby-Weist mine, SW sec. The best way to learn about minerals is to study with a collection of small specimens that you can handle, examine, and observe their properties. R.6W. — Small books and cluster of silvery to greenish yellow muscovite up to 4 mm. ADAMS COUNTY: Muscovite in common in quartzite and granitic rocks at Hamilton Mounds, Sec. 7 and N 1/2 sec. Acrylic, fiberglass, nylatron, nylon, polyester, styrene, vinyl-PVC, and vulcanized fibers are all finding use equipment. These panes were called "muscovy glass" and that term is thought to have inspired the mineral name "muscovite.". These crystals are called "books" because they can be split into paper-thin sheets. MARATHON COUNTY: Muscovite is a common constituent of the granites of the Wausau Complex (Falster, 1987) Ninemile complex near Wausau (Patton et al., 1989) and Mosinee (Anderson et al., 1980). WAUPACA COUNTY: Muscovite occurs in the granite quarried in Waupaca (SW sec. While ground mica might sell for $300 per metric ton, sheet mica for specialty uses can sell for prices up to $2000 per Muscovite. R.2E. Muscovite is the most common mineral of the mica family. Muscovite is characteristic of granite and granite pegmatites, associated with quartz and feldspars. 5 T.23N. These crystals are called "books" because they can be split into paper-thin sheets. In igneous rocks, it is a primary mineral that is (Buchholz et al., 2005b). It is an important rock-forming mineral present in igneous, metamorphic, and sedimentary rocks. Large crystals of muscovite are often found in veins and pegmatites. Muscovy Province in Russia yielded sheet mica for a variety of uses. Some of the highest quality ground mica is used in the cosmetics industry. Some of these involve making mica sheets from ground mica composites or the creation of synthetic micas in and nail polish. an important ingredient in blushes, eyeliner, eye shadow, foundation, hair and body glitter, lipstick, lip gloss, mascara, Thick specimens often appear to be black, brown, or silver in color; however, when split into thin sheets muscovite is colorless, sometimes with a tint of brown, yellow, green, or rose. The flat mica particles coat the Muscovite Crystallography: Axial Ratios: a:b:c =0.5747:1:2.2203 : Cell Dimensions: a = 5.19, b = 9.03, c = 20.05, Z = 4; beta = 95.5° V = 935.33 Den(Calc)= 2.83 accessibility issues: [email protected], Home EAU CLAIRE COUNTY: Muscovite is found in a pink pegmatite dike near the County K Bridge over the Eau Claire River at SW NW sec. SAUK COUNTY: Fine grained sericite is common in the Baraboo Quartzite and Baxter Hollow Granite (Gates, 1942). Muscovite and Fuchsite. YouTube Muscovite and sometimes similar species were earlier called mica (Phillips and Kersey, 1706), glimmer (Phillips and Kersey, 1706), and isinglass (1747 according to OED) but all of these terms are still in use to some degree. USGS image. and in the SE SW sec. — Muscovite is a common constitutent of the argillite and quartzite found in quarries and roadcuts near Power’s Bluff, NE NE sec. should be able to supply domestic demand, with some mica being imported for specialty use or where transportation from (Greenberg et al., 1976). 11 T.32N. When chromium substitutes for aluminum in muscovite the material takes on a green color and is known as "fuchsite." Maps/Data 34 T.9N. cesium. FOREST COUNTY: Sericite is abundant in the altered volcanic rocks of the Crandon massive sulfide deposit near Little Sand Lake. Muscovite rarely occurs in igneous rocks of intermediate, mafic, and ultramafic composition.