Sphere from Russian Jasper

Russian jasper. Hand made spheres.
Colors - typically red of diverse hues or brown; less commonly green or just about any color, white, gray or black; even less commonly zoned -- e.g., ill-defined stripes that are yellow, bluish, purplish, gray or nearly black -- with some specimens cloudy, variegated, roughly banded and/or spotted. In practice, color leads to some of the problems that arise when one is naming some materials jasper rather than chert: a "rule of thumb" (albeit based on one's subjective sense of and feelings about color) to which I subscribe, is "if the given rock exhibits attractive colors call it jasper, otherwise call it chert."