actinolite schist specimen. actinolite is an amphibole silicate

actinolite amphibole amphibolite asbestos background chlorite collage color crystal crystalline detail gemmological gemmology gemological gemology gemstone geological geology green greenschist greenstone hornblende material metamorphic mine mineral mining natural nature object orange ore pattern pebble piece precious quarry raw rock rocks sample schist silicate specimen stone surface texture textured various