of dickite occurs in porous algal limestones in the form of a white powder. The more disordered dickites can be found in less porous rocks. Another occurrence spot, as indicated by Brindley and Porter of the American Mineralogists journal, is the Northerly dickite-bearing zone in Jamaica. The dickite in this zone ranges from indurate breccias containing cream to pinkish and purplish fragments composed largely of dickite with subordinate anatase set in a matrix of greenish dickite, to discrete veins and surface coatings of white, cream and translucent dickite. It appears that dickite in the northerly zone were formed by hot ascending waters from an uncertain origin. Dickite is found worldwide in locations such as Ouray, Colorado, US; San Juanito, Chihuahua, Mexico in a silicified zone among the rhyolite area; and in St. George, Utah, US, where the mineral is thought to be associated with volcanic rock. An extensive study was done on dickite pertaining to its location in Pennsylvanian limestones of southeastern Kansas, US. In the dickite deposits of southeast Kansas the distribution is dependent on the following: the stratigraphic alternation of limestones and shales, westward regional dip, thick deposits of highly porous algal limestones, and igneous intrusions. It was found that groundwaters substantially heated along with magmatic waters which made its way up-dip and through the intrusions in the conduit-like algal mounds which allowed the dickite to be deposited in this area and it might be conclusive to say that this trend follows elsewhere in other locations around the world. Physical properties Dickite takes on the appearance of a white, brown earthy color and is often found embedded in many other minerals such as quartz. Dickite has perfect cleavage in the (001) direction. Its color varies from blue, gray, white to colorless. It usually has a dull clay-like texture. Its hardness on the Mohs scale is 1.5-2, basically between talc and gypsum. This is attributed to its loose chemical bonds. It is held with hydrogen bonds, which are otherwise weak. It leaves a white streak and it has a pearly luster. It has a density of 2.6. Dickite is biaxial, its birefringence is between 0.0050-0.0090, its surface relief is low and it has no dispersion. The plane of the optical axis is normal to the plane of symmetry and inclined 160, rear to the normal to (0,0,1). The atomic structure of dickite, being very similar to that of kaolinite