Perlit

Perlit (az frans. rerle — marvorid), shishai vulsqonii tursh, ki hangomi shikastan parra-parra judo meshavad. Rezahoi khurdi on bazan chun marvorid jilo medihand. Perlit az jihati  tarkib bo lavahoi tursh — liparitho, dasitho va gayra muvofiqat nekunad. Dar vaqti tez  tafsonidan obi Perliti maydakardashuda ba bug tabdil meyobad va khudi jins muloim shuda, hajmash to 10— r- 20 marotiba meafzoyad.

Harorati damishi Perlit 850—1000°S (bazan to 12004}), Perliti damidaro baroi tayyor kardani  betoni sabuk (perlitobeton) va  masnuoti garminoguzar (bo ilovai  bitum, silikat, safol va gayra) istifoda mebarand. Perliti damida inchunin  dar khojagii qishloq, sanoati khimiya, korkardi neft, khurokvori, dorusozi, shisha ba kor meravad. Dar SSSR qabathoi , gafsi shishahoi  vulqoni (Perlit va obisidian) dar Armaniston, Ozarboyjon, Qazoqiston, Tojikiston (dar  nishebihoi janubi qatorkuhi Qurama), Zabaykaliya, Primoriya yoft shudaand.