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2. About Feldspar
Feldspar is the name of a large
organization of rock-forming silicate
minerals that make up over 50% of
Earth’s crust. They are discovered in
igneous, metamorphic, and
sedimentary rocks in all components
of the sector. Feldspar minerals have
very comparable structures, chemical
compositions, and bodily properties.
Common feldspars consist of
orthoclase (KAlSi3O8), albite
(NaAlSi3O8), and anorthite
(CaAl2Si2O8).

3. ManytypesFeldspar
Mineral Composition
Albite NaAlSi3O8
Amazonite KAlSi3O8
Andesine (Na,Ca)(Al,Si)4O8
Anorthite CaAl2Si2O8
Anorthoclase (Na,K)AlSi3O8
Banalsite Na2BaAl4Si4O16
Buddingtonite (NH4)AlSi3O8
Bytownite (Ca,Na)(Al,Si)4O8
Celsian BaAl2Si2O8
Dmisteinbergite CaAl2Si2O8
Filatovite K(Al,Zn)2(As,Si)2O8
Hexacelsian BaAl2Si2O8
Hyalophane (K,Ba)(Al,Si)4O8
Mineral Composition
Kokchetavite KAlSi3O8
Kumdykolite NaAlSi3O8
Labradorite (Ca,Na)(Al,Si)4O8
Microcline KAlSi3O8
Oligoclase (Na,Ca)(Al,Si)4O8
Orthoclase KAlSi3O8
Paracelsian BaAl2Si2O8
Reedmergnerite NaBSi3O8
Rubicline (Rb,K)AlSi3O8
Sanidine KAlSi3O8
Slawsonite SrAl2Si2O8
Stronalsite Na2SrAl4Si4O16
Svyatoslavite CaAl2Si2O8

5. Feldspars, which constitute about 60% of the earth’s crust, are
anhydrous aluminosilicate minerals of two main groupings:
potassium- to sodium-alkali feldspars and sodium- to calcium-
plagioclase feldspars. The alkali feldspars mostly are used in
glassmaking and ceramics, and the plagioclase feldspars, especially
the sodium-rich varieties, are mainly used in ceramics and various
construction applications. Plagioclase of higher calcium content is
used for its alumina content across multiple construction products,
such as fiberglass or for the strengthening of glass-reinforced plastic
products

6. Production data
More than 70 countries had
significant resources of feldspar
and more than 40 produced
feldspar in 2017; world production
was 24.7 Mt. The leading feldspar-
producing countries in 2017 were
Turkey, China, and Italy, followed by
India, Thailand, and Iran, in
descending order of production
• In glassmaking, feldspar
provides alumina for
improving hardness,
durability, and resistance
to chemical corrosion.
• In ceramics, feldspar is
used as a flux, lowering the
vitrifying temperature of a
ceramic body during firing
and forming a glassy
phase. Glass and ceramics
continued to be the major
end uses of feldspar.

8. India is rich in Quartz & Feldspar deposits
and one among the leading countries in
Quarrying and Export of Quartz & Feldspar.
India has about 110 different varieties of
Quartz & Feldspar which are different in
colour and texture. These varieties are
used to produce monuments, building
slabs, titles, surface plates etc. The
demand and supply for the Quartz &
Feldspar is growing which makes a lot of
scope for revenue generation.
Feldspar Mining - India

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