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The center of the crystal surface are relatively raised was surface and crystal edges bent the arc of the crystal was known as the convex crystal. All convex crystal by geometric polyhedron tend to be a transitional form of the spherical body. Figure 1-1-23 (a) shows the diamond rhombic dodecahedron convex crystal. You can use the cufflinks cleaner sold on the market. Convex crystal will again be dissolved due to the formation of crystals formed, as in the horns and crystal edges of the particle free energy higher than in the crystal surface by the large horns and crystal edge parts of the solvent contact probability, therefore, their dissolution rate was faster than the center of the crystal surface.
    Refers to the overall presentation of the curved shape of the crystal. The difference is that of the curved crystal with convex crystal: convex crystal faces are bulging, curved crystal side of the crystal faces were protruding, on the contrary side of the crystal face recurve As shown in the dolomite saddle-shaped curved crystal, as shown in Figure 1-1-23 (b). Dip the cufflinks in soap and warm water.  Crystal surface constituted by a series of so-called proximal straight stripes, stripes known as the crystal surface. Stripes of the crystal surface crystal formation during the growth process, can be seen in many crystals. Such as quartz crystal cylinder, often with stripes; tourmaline crystal cylinder. Is often with vertical lines (see Figure 1-1-24 (a)); cube crystal face of pyrite often striped, three pairs of parallel crystal planes perpendicular stripe directions.
Crystal plane stripes adjacent surface were thin strip with the main crystal appear before ladder iterative growth caused by the so-called adjacent surface is some minor crystal surface in the crystal, with the main crystal faces of a small angle difference and the main crystal faces belonging to different simplex. Wipe the cufflinks gently with a soft cloth. As stripes of α-quartz crystal surface is the surface stripes of alternating pyrite crystal growth and the formation of the hexagonal prism and rhombohedron narrow crystal surface by the growth of cube and pentagonal dodecahedron of two single-crystal surface interaction to form the.
    In addition to the crystal surface stripes, the crystal surface during the growth process can also be left behind by the growth layers, the spiral pattern and growth of Confucius and other surface features. In addition, after the formation of crystals subjected to corrosion will be formed in the crystal surface pitting (corrosion pits), the shape of the pits, side. And distribution of the internal particle arrangement of control, reflect the crystal symmetry, it can be used as a basis for the identification of crystals of the original stone. Such as the diamond surface such as an equilateral triangle pits. The crystallization habit of the mineral is generally present crystal form, it consists of two aspects. For platinum cufflinks inlaid with precious stones, they need to be cleaned for once every six months.
    First, the simplex of the same kind of crystals are accustomed to see. A crystal often has its own crystal habit, and that the crystals often show one or a several-simplex. For example, the spinel learning to see a single shaped octahedral fluorite in igneous rocks and pegmatites, often has octahedral, high. The formation of the mesothermal often has rhombic dodecahedron, the formation of epithermal the Changcheng cube. There were any invisible scratches on the cufflinks to the naked eye, or a layer of natural oxide. Second, the proportion of crystals in three-dimensional extension. Crystal is extended in three-dimensional space can be broadly divided into three types: The three equal length, refers to the degree of development of the crystal in the three-dimensional space is basically the same, showing a granular or equiaxed, such as garnet.