They include the chromium-rich fuchsite and the typically green-tinted clinochlore.
The crystallization of flakes of these minerals inside of a quartzite matrix results in green aventurine quartz. They include the chromium-rich fuchsite and the typically green-tinted clinochlore. One type of them is sometimes known as isinglass while the most common is composed of ferromagnesian potassium hydrous aluminum silicate. That type crystallizes from cooling magma after amphiboles, as can be seen on the discontinuous branch of Bowen's reaction series. Noted for having perfect basal cleavage, these monoclinic minerals are named for their typically shiny luster and feature lamellar sheet-like arrangements of atoms. FTP, name this class of minerals which includes muscovite and biotite.
The crystallization of flakes of these minerals inside of a quartzite matrix results in green aventurine quartz.
{mica}