set of various aegirine rocks on white

acmite acnite aegerine aegerite aegirine aegirite aegyrina aegyrine aegyrite aemite agirine background black brown collage collection crystal crystalline cut cutout druse gem gemstone isolated macro matrix microcline mineral natural nepheline nephelite out pebble piece polished raw rock rolled rough sample sanidine set specimen stone structure surface texture tumbled unpolished various white