What is old nature Shoushan stone

Shoushan stone old nature, for the mining time is earlier, the stone quality of the oily feeling is stronger, after people play with the stone for a longer period of time.

Old Shoushan stone evaluation and identification standards are different from the general identification of precious stones, also different from the usual mineral identification. Craft Shoushan stone raw material identification should include ore eye identification and indoor instrumentation detection of two parts, that is, the combination of art and natural science, and master the formation of Shoushan stone multi-phase, complexity and cause of the diversity of types and Shoushan stone processing process performance and other basic knowledge, which is an effective identification method, appreciation of the merits of Shoushan stone should start from its quality and physical properties, eye observation indicators should pay attention to the following aspects.

Color. This indicator is the vast majority of precious stones, including Shoushan stone and minerals, the most important evaluation characteristics, but also the most striking aspects. White Shoushan stone main minerals are geodes or kaolinite, that is, pure geodes or kaolinite composition, in addition to silicon, aluminum and sodium, the other components are very few; red is mainly caused by a large number of iron components; green Shoushan stone is mainly caused by magnesium and iron and chromium components; purple-red due to a small amount of iron components; yellow Shoushan stone is mainly caused by iron oxide or calcium oxide or oxidized vanadium or chromium oxide, and so on; gold or yellow-orange Shoushanite is caused mainly by nickel oxide components and may also be caused by pyroxene oxides.

Texture. Refers to the stone quality and degree of crystallization of Shoushan stone. To dense, pure, moderate hardness, small porosity, delicate and solid to the touch, no weathering for good, while the texture is loose and porous and has been weathering groove with the poor, if the texture is dense and uniform, delicate, smooth surface, can be identified as a high-quality products.

Texture. Refers to the pattern of shoushan stone texture structure. Texture only composed of a certain pattern or sequential arrangement is meaningful. Shoushan stone texture form is very rich, different Shoushan stone varieties have different texture form, such as Tianhuang stone "radish grain" like radish skin texture. Some Shoushan stone texture connotation, can be characters, animals, birds, insects and fish, but also can be landscape stories or abstract patterns. Therefore, texture is one of the important factors in evaluating the quality of the stone,

Luster. Refers to the Shoushan stone surface cleanliness, transparency and other aspects. Shoushan stone surface luster and other indicators of elements is what we often say "stone moist", that is, transparent or translucent, clean and bright, white and flawless, appear delicate and transparent.

Abundance. Refers to the distribution of Shoushan stone species varieties, the output of the abundance or scarcity.

Completeness. Refers to the size of the block of Shoushan stone. The surface of the stone without any new traces of damage and large defects, texture pattern pattern rare, full of changes, color matching reasonable, so that can be called perfect.