Mineral lookthrough glass5/3/2023 Other Characteristics: Cleavage sheets are flexible and elastic, meaning they can be bent and will flex back to original shape.īest Field Indicators: Crystal habit, cleavage, elastic sheets, color and associations.Gold is the yellow stuff that made the world run for much of human history. Specific Gravity: Approximately 2.8 (average)Īssociated Minerals: Quartz, feldspars, beryl and tourmalines. Twinned crystals can form flat five pointed stars.Ĭleavage: Perfect in one direction producing thin sheets or flakes.įracture: Not readily observed due to cleavage but is uneven. Also as lamellar rock forming masses and small flakes in detrital material. The sides of the crystal often tend to tapper. Muscovites four prism faces form diamond shaped "books" and if modified by another pinacoid they form pseudo-hexagonal crystal "books". Transparency: Crystals are transparent to translucent.Ĭrystal Habits: Tabular crystals with a prominent pinacoid termination. It can help sufferers of insomnia, night sweats, nightmares, restless leg syndrome and sleep apnoea.Ĭolor: White, silver, yellow, green and brown. It can be used during times of cleansing or fasting to help reduce hunger pangs, provide energy, relieve dehydration and give a general boost. Muscovite encourages clarity in visions and self reflection. It can also help in auric cleansing and unblocking the psychic channels. It allows you to reflect on the past and the self objectively, and without fear. Muscovite is great for inspiring reflection and self assessment. Because of its silvery sheen, Muscovite is sometimes called cat's silver. Muscovite can be pink, colourless, silver-white, yellowish, greenish with a pearly lustre on cleavage faces. It also occurs as foliated, scaly lamellar masses. Muscovite occurs as tabular, commonly twinned pseudo-hexagonal crystals often with deep striations on the prism faces. The composition of these minerals are hydrous potassium aluminium silicate with a lustre that varies from transparent to pearly. Muscovite is a member of the mica group, an important component of granite and some schist. It is also ground in to paints, used as a joint cement, dusting agent, in well-drilling muds, and in plastics, roofing, rubber, and welding rods. It also has electrical and heat resistance properties which make it good for insulating electrical components. Muscovite is ground up and mixed in with paints to give them a sparkle. Muscovite is in demand for the manufacture of fireproofing and insulating materials and to some extent as a lubricant. It was used as a glass because of its transparent layers that peel off in thin sheets. Its first known use was in Russia as a glass. Notable Occurrences include India, Pakistan, Brazil and many USA localities. In pegmatites, it is often found in immense sheets that are commercially valuable. Muscovite is the most common mica, found in granites, pegmatites, gneisses, and schists, and as a contact metamorphic rock or as a secondary mineral resulting from the alteration of topaz, feldspar, kyanite, etc. Muscovite is ground and used to give wallpaper a shiny luster today., and it is used in eye makeup and glitter. Muscovite used to be known as isinglass, and it was used on furnaces, so that you could look through the furnace as what tempered glass does today. Muscovite gets its name from Muscovy state in Russia, where the mineral was used a glass substitute in the 14th century. The name Muscovite comes from the English words Muscovy glass, which is the name of a type of glass used in Russia that is made with Muscovite Mica. A deep green variety is called fuchsite and is colored by chromium impurities. A rare twin variety from Brazil forms yellow five pointed stars and is called "Star Muscovite". Some very nice muscovite crystals accompany such valuable minerals as tourmaline, topaz, beryl, almandine and others. Muscovite is not often valuable as a mineral specimen but is often associated with other minerals of extraordinary beauty and value. Muscovite sheets were used for kitchen oven windows before synthetic materials replaced them. ![]() The sheets of muscovite also have high heat and electrical insulating properties and are used to make many electrical components. Although it has such easy cleavage, the cleavage sheets are quite durable and are often found in sands that have undergone much erosion and transport that would have destroyed most other minerals. These potassium ion layers produce the perfect cleavage of muscovite. Muscovite has a layered structure of aluminum silicate sheets weakly bonded together by layers of potassium ions. ![]() Muscovite is a common rock forming mineral and is found in igneous, metamorphic and detrital sedimentary rocks. ![]() Uses: heat and electrical insulator for industrial purposes.ĬLICK HERE To Purchase Kidz Rocks Mica Products. Chemistry: KAl2(AlSi3O10)(F, OH)2, Potassium aluminum silicate hydroxide fluoride.
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