Last Updated: July 23, 2013   
Isotropic Minerals
 Analcime - Fluorite - Garnet - Hauyne - Leucite - Periclase - Perovskite - Sodolite - Spinel - Volcanic Glass
Uniaxial Minerals

Uniaxial Positive: Apatite - Beryle - Calcite - Corundum - Dolomite - Idocrase (Vesuvianite) - Jarosite- Magnesite - Melilite - Nepheline - Scapolite - Siderite - Stilpnomelane - Tourmaline

Uniaxial Negative: Alunite - Brucite - Cassiterite - Quartz - Rutile - Scheelite - Willemite - Zircon
Biaxial Minerals
 Albite - Actinolite - Amphiboles - Andalusite - Anorthite - Aragonite - Biotite - Chlorite - Chloritoid - Cordierite - Dolomite - Epidote - Feldspars - Glaucophane - Hornblende - Kyanite - Microcline - Muscovite - Olivine - Orthoclase - Penninite - Pyroxenes - Riebeckite - Sanidine - Serpentine - Sillimanite - Sphene - Staurolite - Stilpnomelane - Talc - Topaz - Tremolite - Wollastonite