Shiv Shakti Minelars
Shiv Shakti Minelars


Lumps of Feldspar

Feldspar & Quartz: We sell high-quality feldspar  & quartz for all industrial purposes. contact us and we will be pleased to send you samples and minerals laboratory reports for your kind consideration.
Feldspar is the name of a group of rock-forming minerals which make up as much as 60% of the Earth's crust.
The Analysis Report for Our Feldspar samples [pictures shown above]





Fe2O3 %

Al2O3 %

CaO %

MgO %

Loss on Ignition %










Feldspars & quartz crystallize from magma in both intrusive and extrusive rocks, and they can also occur as compact minerals, as veins, and are also present in many types of metamorphic rock. Rock formed entirely of plagioclase feldspar is known as anorthosite. Feldspars are also found in many types of sedimentary rock. Feldspar is a common raw material in the production of ceramics. Feldspars are used for thermoluminescence dating and optical dating in earth sciences and archaeology
Feldspar: A rock-forming mineral, industrially important in glass and ceramic industries, pottery and enamelware, soaps, abrasives, bond for abrasive wheels, cements and concretes, insulating compositions, fertilizer, poultry grit, tarred roofing materials, and as a sizing (or filler) in textiles and paper. Albite is a feldspar mineral and is a sodium aluminium silicate. This form of feldspar is used as a glaze in ceramics.
Background Feldspar is the mineral name given to a group of minerals distinguished by the presence of aluminium (Al) and the silica ion (SiO4) in their chemistry. This group includes aluminium silicates of soda (sodium oxide), potassium (potassium oxide), or lime (calcium oxide). Feldspar is the single most abundant mineral group on Earth. Together, the varieties of feldspar account for one half of the Earths crust. The minerals included in this group are orthoclase, microcline, and the plagioclase feldspars. They form in a variety of thermal environments, during the crystallization of liquid rock (magma), by metamorphism of rocks deep in the earth, and in sedimentary processes. Feldspars are relatively hard at 6 on Mohs' hardness scale. Feldspars are generally light-coloured, including white, pink, tan, green, or grey. The colour varies due to impurities within the crystal structure. Feldspar is the mineral that gives granite its pink, green or grey colour. When feldspar weathers from igneous or metamorphic rocks, it can accumulate as sand. It is, however, easily weathered, and eventually will break down into the clay.
Name The name feldspar is a contraction of the longer name feldspar, some early specimens were found in fields. The term spar is a generic term used by geologists to refer to any non-metallic mineral with a glassy (vitreous) lustre that breaks on distinct flat surfaces (planes). The name was officially given its name by Johan Gottschalk Wallerius in 1747.
Sources Feldspar is mined from large granite bodies (called plutons by geologists), from pegmatites (formed when the last fluid stages of a crystallizing granite become concentrated in small liquid and vapour-rich pockets that allow the growth of extremely large crystals), and from sands composed mostly of feldspar. Because feldspar is such a large component of the Earths crust, it is assumed that the supply of feldspar is more than adequate to meet a demand for a very long time to come. It is so abundant that geologists and economists have not even compiled data on potential deposits of feldspar for future consumption. Present mines worldwide are adequately meeting the need for raw feldspar.

Uses :
Feldspar is used to make dinnerware and bathroom and building tiles.
Also used in Ceramics Industries, Glass Industries, Insulator  Industries