Last Updated: June 4, 2006

Isotropic Minerals Analcime - Fluorite - Garnet - Hauyne - Leucite - Periclase - Perovskite - Sodolite - Spinel - Volcanic Glass Uniaxial Minerals Brucite - Calcite - Nepheline - Quartz - Tourmaline - Zircon Biaxial Minerals Actinolite - Allanite - Amphiboles - Andalusite - Biotite - Chlorite - Chloritoid - Cordierite - Epidote - Feldspars - Kyanite - Muscovite - Olivine - Pyroxenes - Riebeckite - Serpentine - Sillimanite - Sphene - Staurolite - Stilpnomelane - Talc - Wollastonite