feldspar mineral information

Feldspar | Encyclopedia.com

Feldspar Feldspar is the most common mineral on Earth [1], constituting approximately 60% of the crust . It forms directly from cooling magma and is a major component of …

USGS Minerals Information: Feldspar

Statistics and information on the worldwide supply, demand, and flow of feldspar

USGS National Minerals Information Center

National Minerals Information Center Statistics and information on the worldwide supply of, demand for, and flow of minerals and materials essential to the U.S. economy, the national security, and protection of the environment.

Feldspar | iMinerals Inc.

The feldspar group minerals are the most abundant minerals in the earth's crust. High concentrations of alumina (Al 2 O 3) and alkalis (K 2 O and Na 2 O) together with low levels of trace elements such as iron oxide (Fe 2 O 3) define a high quality feldspar product.

feldspar | Properties, Uses, Types, & Facts | Britannica.com

Feldspar: Feldspar, any of a group of aluminosilicate minerals that contain calcium, sodium, or potassium. Feldspars make up more than half of Earth's crust, and professional literature about them constitutes a large percentage of the literature of mineralogy. Learn more about the properties and uses of feldspar in this article.

Feldspar gemstone information - Gemstone Database

Feldspar is derived from German "Feld"- field and "Spath" - a rock that does not contain ore. There are two main subgroups that produce gems: the potassium feldspars and the plagioclases (a series from calcium to sodium feldspars).

Feldspar Facts for Kids | KidzSearch.com

Feldspar is the name of a group of rock-forming minerals that make up as much as 60% of the Earth's crust. Feldspar forms crystals from magma in both intrusive and extrusive rocks, and they can also happen as compact minerals, as veins, and are also present in many types of metamorphic rock.

Orthoclase Feldspar - Geology

Orthoclase is the feldspar mineral of pink granite, the #6 mineral of the Mohs hardness scale, and one of the two minerals that comprise Moonstone.

What is Feldspar? - Industrial Minerals Association ...

Feldspar minerals are essential components in igneous, metamorphic and sedimentary rocks, to such an extent that the classification of a number of rocks is based upon feldspar content.

Feldspar mineral - ScienceDaily

Feldspar is the name of a group of rock-forming minerals which make up as much as 60% of the Earth's crust. Feldspars crystallize from magma in both intrusive and extrusive rocks, and they can ...

Plagioclase - Wikipedia

Plagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continuous solid solution series, more properly known as the plagioclase feldspar series (from the Ancient Greek for "oblique fracture", in ...


The feldspar group is a fairly large group with nearly 20 members recognized, but only nine are well known and common. Those few, however, make up the greatest percentage of minerals …

What is the difference between a rock and a mineral?

A mineral is a naturally occurring inorganic element or compound having an orderly internal structure and characteristic chemical composition, crystal form, and physical properties. Common minerals include quartz, feldspar, mica, amphibole, olivine, and calcite. A rock is an aggregate of one or more

Feldspar | Earth Sciences Museum | University of Waterloo

Back to Rocks and Minerals Articles. Kathy Feick. x Al(Al,Si) 3 O 8 ("x" can be sodium and/or calcium and/or potassium) Feldspar was officially given its name by Johan Gottschalk Wallerius in 1747.

About Us - Feldspar

The company was formed in 2011, and is a joint venture between Imerys Minerals and Norsk Mineral AS. For more information on both companies, take a look at our history . The vision of The QUARTZ Corp is to become a major and sustainable player in the mica, feldspar, and high purity quartz.

Feldspar minerals make up over 50% of Earth's crust.

What is Feldspar? "Feldspar" is the name of a large group of rock-forming silicate minerals that make up over 50% of Earth's crust. [1] They are found in igneous, metamorphic, and sedimentary rocks in all parts of the world.

Feldspar Group: Mineral information, data and localities.

A group of silicate minerals. May contain (very minor amount of) OH groups, considered as defects (e.g., Yang et al., 2015). In petrology the group is ...

K Feldspar: Mineral information, data and localities.

Adularia: A more ordered low-temperature variety of Orthoclase or partially disordered Microcline. Individual localities should be verified because the adularia structural state is nearly equally represented by microcline and orthoclase specimens.

Feldspar Value, Price, and Jewelry Information ...

Comments. Feldspars are the most common minerals at the Earth's surface. In fact, if the entire composition of the Earth's crust were regarded as a single mineral, it would calculate out almost exactly as a feldspar.

A Detailed Overview of Feldspar: Types, Properties, and Uses

Some of the rocks are categorized based on the content of feldspar in them. This fact demonstrates the significance of this mineral. The mineral feldspar can be subdivided into different types, depending on the proportion of the elements sodium, calcium, or potassium.


The QUARTZ Corp is a leading producer of high-purity, low-iron quartz, feldspar, and mica in North America, with a strong global presence with offices and product stores in …

University of Minnesota's Mineral Pages: Potassium Feldspar

A combination of hardness, non-metallic luster and two good cleavage directions at right angles to one another serves to distinguish the feldspar minerals from most of the common rock-forming minerals.

Feldspar - Chemical composition | Britannica.com

When feldspar or soapstone (steatite) is added to the clay and exposed to a temperature of 2,000 to 2,650 °F (1,100 to 1,450 °C), the product becomes translucent and is known as porcelain.

Anorthite: The feldspar mineral Anorthite information and ...

Detailed description, properties, locality information guide about the plagioclase feldspar mineral anorthite.

Feldspar - Wikipedia

Albite is a very common mineral, but localities where fine Albite crystals can be found are more limited. Some excellent examples have come from the Swiss Alps and the Tyrol, Austria.

Feldspar | IMA Europe

Feldspar is by far the most abundant group of minerals in the earth's crust, forming about 60% of terrestrial rocks. Most European deposits offer potassium feldspar as well as sodium feldspar …