felspar
121picrite — /ˈpɪkraɪt/ (say pikruyt) noun a granular igneous rock composed chiefly of olivine and augite, but containing small amounts of felspar. {Greek pikros bitter + ite1} …
122plagioclase — /ˈpleɪdʒioʊˌkleɪz / (say playjeeoh.klayz), / ˌkleɪs/ (say .klays) noun any of the felspar minerals varying in composition from NaAlSi3O8 to CaAl2Si2O8, important constituents of many igneous rocks. {Greek plagio(s) oblique + klasis fracture} …
123porphyry — /ˈpɔfəri / (say pawfuhree) noun (plural porphyries) 1. any igneous rock containing conspicuous phenocrysts in a fine grained or aphanitic groundmass. 2. a very hard rock, quarried in ancient Egypt, having a dark, purplish red groundmass… …
124sanidine — /ˈsænədin/ (say sanuhdeen) noun a mineral form of potash felspar, similar to orthoclase and occurring in some lavas. {German} …
125scarab — /ˈskærəb / (say skaruhb) noun 1. Also, scarab beetle. any scarabaeid beetle, especially Scarabaeus sacer, regarded as sacred by the ancient Egyptians. 2. a representation or image of a beetle, much used among the ancient Egyptians as a symbol,… …
126sunstone — /ˈsʌnstoʊn/ (say sunstohn) noun aventurine felspar …
127syenite — /ˈsaɪənaɪt/ (say suyuhnuyt) noun a granular igneous rock consisting typically of felspar (orthoclase) and hornblende. {Latin Syēnītēs(lapis) (stone) of Syene, former name of Aswan, a city in SE Egypt} –syenitic /saɪəˈnɪtɪk/ (say suyuh nitik),… …
128trachyte — /ˈtreɪkaɪt/ (say traykuyt), /ˈtræk / (say trak ) noun a volcanic rock, commonly of porphyritic texture, consisting essentially of alkali felspar and one or more subordinate minerals, as hornblende, mica, etc. {French, from Greek trāchytēs… …
