The chemical formula of mineral Admontite is indicated by Mg(B6O10).7(H2O). Admontite is usually found in a gypsum deposit. Its type of locality includes Schidmaur, Austria, near Admont. It is named after Admont, Austria near its locality. Admontite is known to crystallize in the monoclinic prismatic system of crystal formation. 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 oblique or not perpendicular to one another. However, both of which are commonly found perpendicular to the third axis. Mineral Admontite has no cleavage even if it is evaluated with the aid of petrographic polarizing light microscope used in the field of optical mineralogy. Admontite crystals are usually found colorless and could appear more interesting when viewed with the aid of polarizing light microscope used in the field of optical mineralogy. The specific gravity measure of mineral Admontite is usually found ranging from 1.82 to 1.87 grams per cubic centimeters. Most crystals of mineral Admontite are found transparent in appearance. Admontite is also usually found showing conchoidal fracture when viewed under polarized microscopes. In the field of optical mineralogy, fractures developed in brittle materials characterized by smoothly curving surfaces. Admontite crystals are usually euhedral in form. These crystals usually occur as well-formed crystals showing good external form. The hardness measure of mineral Admontite when it is evaluated using the Mohs scale method is usually ranging from 2 to 3. Adamontite crystals are non-fluorescent. They are also most commonly found leaving a white streak when rubbed on a white porcelain streak plate. Admontite is usually found showing biaxial negative figure when evaluated between crossed nicols of polarizing microscopes used in optical mineralogy. It has 0.0620 birefringence. It also exhibits colorless pleochroism. Admontite is not radioactive.