A rare mineral, first observed in the beds of brown-coal in Thuringia. It occurs in tetragonal crystals and nodular masses of a honey-yellow color; it is a mellitate of aluminium. Also called honeystone.
Wiktionary
(1 definition)
–noun
honeystone
GNU Webster's 1913
(1 definition)
–noun
A mineral of a honey color, found in brown coal, and partly the result of vegetable decomposition; honeystone. It is a mellitate of alumina.