pegmatite

N หิน คว๊อตซ และ  Feldspar ที่ เป็น ลายเส้น 

PEGMATITE

n.Primitive granitic rock, composed essentially of lamellar feldspar and quartz; frequently with a mixture of mica. In it are found kaolin, tin tourmaline, beryl, aqua marina, tantale, scheelin and other valuable minerals.

PEGMATITE

Peg "ma *tite, n. Etym: [From Gr. pegmatite. See Pegm. ] (Min. )(a ) Graphic granite. See under Granite. (b ) More generally, a coarse granite occurring as vein material in other rocks.

pegmatite

peg ma tite |ˈpegməˌtīt ˈpɛɡmətaɪt | ▶noun Geology a coarsely crystalline granite or other igneous rock with crystals several centimeters to several meters in length. ORIGIN early 19th cent.: from Greek pēgma, pēgmat - ‘thing joined together ’ + -ite 1 .

pegmatite

pegmatite |ˈpɛgmətʌɪt | ▶noun Geology a coarsely crystalline granite or other igneous rock with crystals several centimetres in length. ORIGIN mid 19th cent.: from Greek pēgma, pēgmat - ‘thing joined together ’ + -ite 1 .