Hardness refers to the jade cufflinks anti-alien forces

Notch carved lines and surface skin bright in color, including pulp is genuine; side lines notches on both sides of the Mao Tao chipping characteristics of the modern "machine work". The quality of the cufflinks will be more reliable.
Jade cufflinks appreciation of knowledge. The quality of the jade cufflinks, to judge from the five aspects of the texture, hardness, transparency, specific gravity and color. Jade cufflinks texture refers to the fine jade cufflinks Windsor extent. The difference is one of Wang and Shi Yu starting delicate, Wen Runjian knot, translucent, shiny, such as fat; stone is rough, dry, lack luster, but also more opaque. Hardness refers to the jade cufflinks anti-alien forces (such as pressure, engraving, grinding) of capacity. The problem of after sales service about the cufflinks is also easier to solve.  The higher the hardness, the greater the difficulty of processing, the better the quality of the jade cufflinks. Jade cufflinks hardness index can be learned through the instrument to detect the internal crystal structure, but the operation is more commonly used to characterize the hardness method.
The hardness of our common jade cufflinks range from 4 - to 6 degrees higher than the hardness of the copper is lower than the hardness of the glass. In other words, the jade cufflinks can carved out of the copper traces can also be glass depicts the traces. People often come through the hardness of the gem cufflinks difference of gems, jade cuff links, color stone. In general, the hardness of precious stones in 7 above, such as diamond, ruby, sapphire, emerald cufflinks gemstones, but Opal gemstones exception, and its Mohs hardness of 5.5; jade cufflinks high hardness Mohs hardness of 6 -7.5 between, such as Hetian jade, Nanyang jade, jade cufflinks; low hardness of jade cufflinks hardness between 4-6, such as Turquoise, Jade (part of the snake texture Yu Shi's hardness lower, can be as low as 2.5). You should not be blind to pursue cheap, while ignoring the quality of the diamond cufflinks. Less than four minerals, generally no longer known as the jade cufflinks, and called color stone. Market-oriented Segments of the cufflinks
In addition to characterize hardness, there is a hardness standard called the compression hardness, indentation hardness, that is, absolute hardness, it refers to the ability of resistance to outside attack force in the jade cufflinks industry also called toughness. Nature the highest compression hardness is a Black Edition, marking 10 degrees, followed by 9 degrees and Tian, compression hardness, emerald cufflinks, Ruby, Sapphire, 8 degrees, diamond, crystal, aquamarine is 7 - 7.5 and so on.