Feldspar sentence example
Feldspar, quartz and granite are quarried in the environs.
His turquoise glazes are obtained by using barium carbonate mixed with soda, feldspar and nepheline syenite.
True granite is an igneous rock made up of mica, feldspar and quartz.
The quartz, mica and feldspar that make up a granite countertop are ground up and mixed with a pigmented resin.
Moonstone originates from the orthoclase feldspar mineral family.Advertisement
In some rocks, particularly alkali granites, the entire volume of the alkali feldspar has been recrystallized.
Pink and white pegmatite typically occurs in veins and contains coarse grained quartz and feldspar.
Sunstone, sometimes called aventurine feldspar, is yellow to red.
I picked up some specimens, with much glassy feldspar, approaching in character to trachyte.
Labradorite is a specific mineral, a calcic member of the plagioclase feldspar group.Advertisement
Minerals such as potassium feldspar can often be included in this group since the high concentration of potassium is diagnostic.
At upper right is a granite with the characteristic pinkish color given by orthoclase feldspar.
Edinbane Pottery make up their own clay body, blending very plastic clays from Dorset, china clay from Cornwall and potash feldspar.
It is a silicate of iron. feldspar feldspath felspar a common rock-forming mineral. fermium a radioactive element, no.
The anorthosite and garnet - pyroxene - feldspar gneisses are intimately related and the complex was probably originally layered.Advertisement
The plagioclase often shows very thin exsolution lamellae of potash feldspar, but nevertheless the original bulk chemical composition was probably low in potassium.
None of these rocks contain large crystals of feldspar, or have the harsh fracture peculiar to trachyte.
At a second contact larger feldspar phenocrysts had grown at right angles to the contact plane.
The porphyry complex has a quartz porphyry core (exposed in Quebrada Majaz ), which intruded an earlier feldspar porphyry complex.
Materials for porcelain, including flint, feldspar and kaolin, abound in the east portion of the Piedmont, the kaolin chiefly in Cecil county, and material for mineral paint in Anne Arundel and Prince George's counties, as well as farther north-west.Advertisement
The light flesh colour of the feldspar, and the blue of the quartz give it in some places a slight pinkish tint, and it is now much used as a building-stone under the name of ` pink granite.'
The south-western part of the country, a vast and almost level plain, is known as Dar Homr. A granitic sand with abundance of mica and feldspar forms the upper stratum throughout the greater part of Kordofan; but an admixture of clay, which is observable in the north, becomes strongly marked in the south, where there are also stretches of black vegetable mould.
About 1896 some remarkably white and pure feldspar began to be quarried in Androscoggin, Oxford and Sagadahoc counties, but afterwards the spar mined in Maine was of less excellent quality; in 1907 the production in Maine was valued at $157,334, the total for the entire country being $499, 06 9.
Milford granite is the typical stone of an area reaching into Rhode Island south of the southern boundary of Providence county; it is a biotite granite of post-Cambrian age, is generally pinkish-gray in colour (owing to the large proportion of feldspar among its constituents), and is widely used for building purposes.
The quarries of granite near Long Island Sound, those of sandstone at Portland, and of feldspar at Branchville and South Glastonbury, however, have furnished building and paving materials for other states; the stone product of the state was valued at $1,386,540 in 1906.Advertisement
The feldspar of a splendid pegmatite and its products of disintegration on the borders of Owari, Mino and Mikawa form the raw material of the very extensive ceramic industry of this district, with its chief place, Seto.
In Chester county, also, is one of the most productive deposits of feldspar, second in importance only to those of Maine.