Video narration
Bahar mila patthar uthayen - granite, balua patthar aur sangmarmar mein fark kya hai? Fark dikhavat ka nahin, banne ke tareeke ka hai. Aagney chattan pighli chattan ke thanda hone se banti hai; granite iska ek udaharan hai. Avasadi chattan ret ke kan dabne aur judne se banti hai; balua patthar iska ek udaharan hai. Kayantarit chattan pehle se bani chattan hai, jo garmi aur dabav se bina pighle badalti hai; sangmarmar iska ek udaharan hai. Isliye teeno alag hain, kyunki unki shuruaat alag-alag hai.