Arkansas Democrat Gazette-I am very upset that I buy newspapers every Sunday. I am very upset that I buy newspapers every Sunday and pay $2.00 and always get coupons and this week the week before Christmas there are none!
Definitions. Cleavage-The tendency of a mineral to break along flat planar surfaces as determined by the structure of its crystal lattice. These two-dimensional surfaces are known as cleavage planes and are caused by the alignment of weaker bonds between atoms in the crystal lattice.leavage and fracture describe different ways in which a mineral can break. Cleavage-The tendency of a mineral to break along flat planar surfaces as determined by the structure of its crystal lattice.
Gemstone cleavage is usually described with reference to crystallographic axes and directions and is also graded according to its âperfection,â or ease with which the gem can be spilt along the cleavage. The five grades or degrees are: none, poor (or weak), fair (or moderate), good (or imperfect), and perfect.