See the obvious cleavage of the cufflinks

Quartz jade cufflinks application has a long history, as early as 500,000 years ago, the Zhoukoudian Peking Man cultural sites in the production of stone tools of useful chalcedony. silica showed that the crystals appear, often formed in the outer or inner layer of agate crystal layer, the remaining aqueous solution was enclosed in the empty part of the agate center, and a water tank agate. Slightly included cufflinksis often known as SI1 and SI2.
Fire agate agate with layers containing iron oxide plate-like mineral crystals, flashing red gloss, the formation of stripe morphology was flame-shaped flame stripes can be a variety of colors of the flame bigger and more beautiful, and its economic value higher. Chalcedony: tectonic granular microcrystalline aggregates known as chalcedony, commercial banded structure of agate, also known as chalcedony. You are able to seen the defects of the cufflinks under the 10-fold magnifying glass. Carnelian: the color pink, dark red, maroon, the color caused by the trace of iron oxide, produced in India, Brazil, Japan, China, Gansu, Ningxia and productive. Chrysoprase: also known as the Australian jade color caused by nickel (Ni), often has irregular plates, massive output. Known origin in Australia. Blue chalcedony: blue, brightly colored and beautiful, translucent, eastern Taiwan productive, because of scarce and expensive.
Jasper: opaque without the stripe structure, the granular aggregates of microcrystalline called jasper, containing impurities affect the transparency. Jasper a variety of colors such as red jasper, green jasper. When the mixed output to different colors, giving a impression of the natural landscape, also known as a scenic jasper. Imperfect cufflinks are often shortened for I1, I2, I3. Jasper with a red dot, also known as "drops of blood stone". Aventurine: contains color flaky green chrome mica quartzite called Aventurine, flaky mineral light reflector to the formation of placer gold effect. Produced in Brazil and other places. Tanglin stone, but other colors, the variety known: containing dumortierite blue to black Aventurine with green chrome mica quartzite, with a red curtain powder and red quartzite.
Secret jade: Password County, Henan, China output of a secondary quartzite, green, pink and other colors. The color is caused by chlorite, iron lepidolite. You can clearly see defects, and sometimes clearly see the obvious cleavage of the cufflinks. Dense jade particles is relatively small, but the cement is not good, not good polishing. Quartzite: also known as Beijing white, non-colored secondary mineral quartzite is usually white translucent, as a soft jade imitation, or as the raw materials of imitation jade cufflinks and other gem stone cufflinks stained. Eight siliceous account of jade cufflinks. Wood stone: also known as the silicide asbestos, asbestos replacement of silica by metasomatism out, but still retains the fibrous structure of asbestos, divided into three types according to their different colors.Malachite is a copper carbonate mineral is a monoclinic system. The crystal morphology was columnar or needle-like, very rare, usually in the hidden crystal bell milky, massive, hull shape, nodular and fibrous aggregates. You can see very small defects as well as the size of the mens cufflinks and location.  With concentric layered, fibers radially structure. Green, malachite green, dark green. Pattern often with a silky luster or shiny glass like transparent to opaque. The refractive index of 1.66 to 1.91, 0.25 of the birefringence, pleochroism is a colorless, yellow-green, dark green. Hardness of 3.5 to 4.5, a density of 3.54 g / cm to 4.1 g / cm 3. Brittle, conchoidal to irregular-shaped fracture. Case of hydrochloric acid react, and easily dissolved.
Quartz minerals are widely distributed in the Earth's crust, a wide range dominated by quartz, jade cufflinks. According to the degree of crystallinity (or recognizable degrees) is divided into aphanitic quartz jade cufflinks (chalcedony, agate) and significant crystalline quartz jade cuff links (quartzite, wood alexandrite, etc.).