To roast (a salt or mineral) until it stops crackling in the fire.
Of salts and minerals, to crackle when heated, indicating a sudden breakdown of their particles.
To fry noisily, sizzle.
To fry something until crisp and curled.
To scorch.
To curl or crisp, as hair; to frizz; to crinkle.
A curl; a lock of hair crisped.