The chemical formula for mineral Xenotime is indicated by YPO4. Xenotime is a Phosphate mineral. It is known to crystallize in the tetragonal system. In optical mineralogy, the tetragonal system of crystallization comprises crystals having three axes, which are all in a position perpendicular to one another. Two axes are usually found having the same […]

The chemical formula of mineral Sillimanite is indicated by Al2SiO5. Sillimanite is a Silicate mineral. It is known to crystallize in the orthorhombic system. In optical mineralogy, the orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths. Sillimanite is a biaxial positive mineral. Its indices of refraction […]

The chemical formula of Monticellite is indicated by Ca(Mg,Fe)SiO4. Monticellite is a Silicate mineral. It is known to crystallize in the orthorhombic system. In optical mineralogy, the orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths. When evaluated under polarizing microscope, Monticellite is known to have biaxial […]

The chemical formula of mineral Monazite is indicated by (Ce, La, Th) PO4. Monazite is a Phosphate mineral. It is known to crystallize in the monoclinic system. In optical mineralogy, the monoclinic system of crystal formation comprises crystals having three axes of unequal lengths. Two of which are usually found in a position that is […]

The chemical formula of Lawsonite is indicated by CaAl2Si2O7(OH)2-H2O. Lawsonite is a Silicate mineral. It is known to crystallize in the orthorhombic system. In optical mineralogy, the orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths. It is also found having biaxial positive figure when viewed under […]

The chemical formula of mineral Hematite is indicated by Fe2O3. Hematite is an Oxide mineral. It is known to crystallize in the hexagonal or trigonal system of crystallization. In optical mineralogy, the hexagonal system of crystallization comprises crystals having four axes. Three of which are positioned in a single plane with equal length and are […]

The chemical formula of Diaspore is indicated by Al2O3H2O. Diaspore is a hydroxide mineral. It is known to crystallize in the orthorhombic crystal system. In optical mineralogy, the orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths. When viewed under petrographic polarizing microscope, Diaspore exhibits a biaxial […]

The chemical formula of mineral Aragonite is indicated by CaCO3. Aragonite is a Carbonate mineral. It is known to crystallize in the orthorhombic system. In optical mineralogy, the orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths. When viewed under polarizing microscopes used in optical mineralogy, Aragonite […]

The chemical formula of the Apatite is indicated by Ca5(PO4)3(OH,F,Cl), Calcium (Fluoro, Chloro, Hydroxyl) Phosphate. Apatite is a Phosphate mineral. Apatite is known to crystallize in the hexagonal system. In optical mineralogy, hexagonal system of crystallization comprises crystals having four axes. Three of which are positioned in a single plane with equal length and are […]

The chemical formula of mineral Andalusite is indicated by Al2SiO5. Andalusite is known to crystallize in the orthorhombic crystal system. In optical mineralogy, the orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths. When viewed under polarizing microscopes for mineralogists, Andalusite is commonly found having biaxial negative […]