हार्ड क्रिस्टलीय खनिजों का कोई भी समूह जिसमें पोटेशियम या सोडियम या कैल्शियम या बेरियम के एल्यूमीनियम सिलिकेट होते हैं

Noun:

एक धातु विशेष,

felspars's Usage Examples:

Kaolin and muscovite are formed principally after felspar (and the felspars are the commonest minerals of all crystalline rocks); also from nepheline, leucite, scapolite and a variety of other rock-forming minerals.

The last of these minerals occurs in small irregular patches between the idiomorphic felspars which Dr J.

Aluminium silicates are widely diffused in the mineral kingdom, being present in the commonest rock-forming minerals (felspars, 'c.), and in the gem-stones, topaz, beryl, garnet, 'c. It also constitutes with sodium silicate the mineral lapis-lazuli and the pigment ultramarine.

Calcium silicate is also present in the minerals: olivine, pyroxenes, amphiboles, epidote, felspars, zeolites, scapolites (qq.v.).

Such parallel overgrowths, termed episomorphs, are very common among the potassium and sodium felspars; and K.

His studies of the eruptive rocks of Corsica, Santorin and elsewhere; his researches on the artificial reproduction of eruptive rocks, and his treatise on the optical characters of felspars deserve special mention; but he was perhaps best known for the joint work which he carried on with his friend Michel Levy.

felspars's Meaning':

any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium