Bournonite
Bouronite was discovered in 1805 by Robert Jameson, who named the new mineral in honor of mineralogist Jacques-Louis's , Comte de Bournon. Bournonite crystals are relatively abundant, usually tabular in appearance of a square, vertical surface grooved. Very often twins and form the so-called "wheel ore". Piece and grainy, ingrown and solid. More info
Bouronite was discovered in 1805 by Robert Jameson, who named the new mineral in honor of mineralogist Jacques-Louis's , Comte de Bournon. Bournonite crystals are relatively abundant, usually tabular in appearance of a square, vertical surface grooved. Very often twins and form the so-called "wheel ore". Piece and grainy, ingrown and solid.