Actinolite is a mineral that contains iron and magnesium. The stones come in a variety of green shades, from pale to dark green, with the darkest stones appearing almost green black or black.
tremolite and actinolite. Dubin pointed out that simply because a structure is elongated, doesn't mean it's asbestos. He ...
The altered zone is about 360 m long and consists of very intense epidote-chlorite-actinolite alteration with disseminated iron oxide boxworks, presumably after pyrite. Copper oxides are locally ...