Treatment: None (unheated

Origin:  Africa

Displays nicely with a ground and rough polished without a mirror finish

Origin:   Nigeria

Amphibole on Matrix | 63.44 gr | Vlčí Hora, Czech Republic IIAB Treatment: None (unheatedAmphibole is a group of dark colored, complex silicate minerals that form in a variety of geological settings. The amphibole group includes several mineral species, such as hornblende, tremolite, actinolite, anthophyllite, and others. Each variety has its own unique chemical composition and physical properties. Amphibole minerals can exhibit a range of colors, including dark green, black, brown, and even colorless. They often have a prismatic crystal