rock butter English

Meaning rock butter meaning

What does rock butter mean?

rock butter noun

— Native alum mixed with clay and iron oxide, usually in soft masses of a yellowish-white colour, occurring in cavities and fissures in argillaceous slate.

Synonyms rock butter synonyms

What other words have the same or similar meaning as rock butter?

rock butter English » English

mountain butter

iron alum

halotrichite

ferric alum

feather alum

butter rock