Таджикистан – Энциклопедия на таджикском языке КИТОБАМ
SANGI ChAQMOQ, chaqmoqsang, mineralest, ki az duoksidi silisii kristalli va amorfi (opal, khalsedon yo kvars) tarkib yoftaast. Dar bayni ohaksang va tahnishasthoi davrai taboshir dar shakli konkresiya va qabatho vomekhurad.
Sangi chaqmoq dar natijai diagenezi tahnishastho, kategenezi jinshoi kuhi va farsoish ba vujud meoyad. Sakhtiash 7. Binobar qirrahoi tez doshtanash Sangi chaqmoqro az asri sang to asri ohan baroi tayyor kardani oloti sangi istifoda meburdand.