Muscovite mica is a common rock-forming mineral that occurs in granites, pegmatites, and metamorphic rocks. It has a sheet-like structure and ranges in color from colorless to various shades of brown, green, and red. Muscovite is the most prevalent mica and is mined commercially, with major deposits located in India, Brazil, and the United States. It has a variety of industrial and commercial uses such as insulation, construction, and paint fillers.

1. MUSCOVITE MICA
BY- ASHISH RANJAN, 12411008

2. What is Mica?
 Mica is a generic term applied to a group of rock-forming complex
aluminosilicate minerals having a sheet or plate like structure with varying
chemical composition and physical properties.

3. Types Of Mica
Of the nine common varieties in the mica group of minerals, the two principal
classes of Mica types of commercial importance are
 Muscovite : K Al2 (Al Si3 O10 )(OH) 2 and
 Phlogopite : K Mg3 (Al Si3O10 )(OH) 2

4. Muscovite Mica
 It is a hydrous potassium aluminium silicate with a predominance of
potassium. It ranges from colourless through browns to greens or reds.

5. Phlogopite Mica
 It is a hydrous magnesium aluminium silicate with a predominance of
magnesium. It is commonly called as “Amber Mica” which varies in colour
from light silver to dark brown or amber.

6. Occurence
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.
In Pegmatites, it is often found in immense sheets that
are commercially valuable.

7.  Exploration and exploitation is successfully carried
by means of systematic vertical shaft and open cast
mining. The principal muscovite mica deposits are
chiefly found in the States of Jharkhand, Rajasthan
and Andhra Pradesh.
 Jharkhand (formerly Bihar State) which produces the
world's finest muscovite mica well known throughout
the globe

10. Muscovite
Mica may be
divided into two
color groups :
RUBY MUSCOVITE
GREEN MUSCOVITE

11. Ruby Muscovite
Colour ranges from an almost white
through pink to a light ruby and
into shades of brownish ruby and
brown. It is produced in the Indian
States of Jharkhand and Rajasthan.

12. Green Muscovite
Ranges from light to pale green through yellowish
and olive green to a dark green. It is produced
in the Indian State of Andhra Pradesh.

13. Physical Properties
 Lustre -Vitreous, Silky, Pearly
 Diaphaneity (Transparency):Transparent,
Translucent

14.  Colour:White to colorless, silvery-white, and tinged various colors by
impurities.
 Streak:White
 Hardness (Mohs): 2½

15.  Cleavage:Perfect
Perfect on {001}.
 Fracture:Micaceous
 Crystal System: Monoclinic with
a = 5.199Å, b = 9.027Å, c = 20.106Å
β = 95.78°

16. DISTINGUISHING SIMILAR MINERALS
 Chlorite and Margarite - Not as elastic as Muscovite.
 Biotite, Phlogopite - Usually darker in color, otherwise very difficult to
distinguish.
 Lepidolite - Very difficult to distinguish from pink Muscovite.
 Gypsum - Cannot be peeled into micaceous sheets, crystals usually
differently shaped.

17. Uses

21. THANK YOU

22.  Muscovite is an extremely common mineral, some bright yellow and others with perfect
star formations, come from the famous pegmatite localites in the Doce and
Jequitinhonha Valleys in Minas Gerais Brazil. Specific localities include Divino das
Laranjeiras ("stars"),Galileia, Governador Valadares, Conselheiro Pena, Jaguaracu,
Aracuai, and Coronel Murta. Beautiful yellow Muscovite comes from the Davib Ost Farm,
Karibib, Erongo, Namibia. Fine Muscovite plates, often associated with
valuable pegmatitegemstones, come from the Shigar Valley and Skardu District in
Northern Pakistan. Nellore, India, is famous for its Muscovite mines which have produced
some of the worlds largest mica sheets. Xuebaoding Mountain, Pingwu, in Sichuan
Province, China, provides excellent Aquamarine and Scheelite that are associated with
beautiful Muscovite plates.
In the U.S., Muscovite is fairly common in the pegmatites of San Diego county, including
Pala and Ramona. Rare Muscovitepseudomorphs after Tourmaline come from the Willow
Spring Ranch, Oracle, Pinal Co., Arizona. A bright pink, lithium-rich variety comes from the
Harding Mine, Taos Co., New Mexico; and gemmy green crystals from Lincoln Co., North
Carolina. Other important localties include Mt Antero, Chaffee Co., Colorado; the
Diamond Mica Mine, Keystone, Pennington Co., South Dakota; Shelby, Cleveland Co.,
North Carolina; and Bedford, Westchester Co., New York.
New England contains some important Muscovite in its famous pegmatites, specifically at
Middlesex Co., Connecticut (East Hampton, Haddam, and Portland); Grafton Co., New
Hampshire (the Palermo No. 1 Mine, Groton; and the Ruggles Mine, Grafton); Mt. Apatite,
Auburn, Androscoggin Co., Maine; and Greenwood and Newry, Oxford Co., Maine.