Jurassic Krakow flint - grey, yellowish-grey, translucent, with sponge spicules Chocolate flint - dark brown or greenish honey-coloured, translucent in light with row of dots-pattern Volhinian (Prut) flint - grey, greyish-brown, translucent with nontransparent stripes Swieciechów-flint - brown, with light dots Erratic Baltic flint - grey translucent with bluish white patina Moravian grey flint varieties