bournonite on the upper left of a tetrahedrite crystal on dolomite

abstract antimony art axotomous background berthonite bournonite close-up collection color crack crystal crystalline crystallography detail dolomite dystomic endellione gem gemology gemstone geology glance jewel jewelry macro micro mineral multicolor natural ore pattern photography precious raw rock rockhounding rough science semi-precious sparkle stone structure sulfosalt surface tetrahedrite texture unpolished volchite wheel