So I feel that prism is made out of chromatic glass but for all that it is worth I couldn't figure out what am I really missing
Same with me. No idea. "Old" way was to use a hammer instead of axe, as far as I remember. At least something you could figure out by trying. "New" way I haven't found out yet. Tried different sides of the chromatic glass block, tried assembling lenses, ...gave up at some point. More interesting things to find out, like, how to process Lux.