The real diamond cufflinks will not have any traces left by the pencil

Use the pencil to gently carve the surface of the genuine diamond cufflinks.   Harmonics, but also very rare, its economic value was more than suet white jade. Gray, purple, black jade: from the ink to the ink, mostly cloudy, striped, containing more fine flake graphite due. A single piece of jade cufflinks are black, and black as pure paint ", which is in the top grade and nephrite is very rare. Another often associated with other colors and nephrite together, can be used as a pretty color.
Jade: jade was dark green, generally do not take other tones In addition to the green tones, the green shades of light and shade change, and jade green with green, blue or yellow tone. General in order to distinguish the two. Jade cufflinks often with black spots and other characteristics (for magnetite, chrome spinel, and other impurities). The real diamond cufflinks will not have any traces left by the pencil.  Jasper for your color green to bright green, black impurities pale of the second, but a large green and black star with, but also the formation of a natural beauty. Jasper is mainly produced in the ultrabasic rocks, rich in iron, copper, chromium, nickel, titanium, vanadium, cobalt and other metals, is the most abundant trace elements in the nephrite variety.
Sugar Jade: a native or secondary role, by the iron oxide, manganese dip was different shades of reddish-brown, brown, dark brown tones and nephrite can be called when the sugar color part is greater than 85% sugar jade. Sugar color also often born with the other colors of the jade pieces together. Sugar jade only mountain material only, so pay attention to the distinction and the sub-compound of sugar, color skin. The sugar white jade: Sugar jade and white jade transition varieties, including sugar, color section accounted for 30-85%. Transitional varieties between sugar jade: with a lot of candy-colored jade, sugar, jade and jade, including sugar, color section accounted for 30% to 8S%. If it is not genuine but the glass, crystal and other materials, it will leave marks on the surface of the cufflinks.
Tsui jade: green to pale emerald green varieties, and occasionally found in some place of origin, named for its green like emerald cufflinks are obviously different with the green of jade, jasper. This jade is rarely a separate output, but was layered or mass associated with white jade, green jade together, can also be directly to the sapphire named.