The cuff links are generally marked on the corresponding position

Petrified wood: petrified wood and plant fossils buried in the ground plant trunk silica replacement remains the cell structure of the trees and even trees, which often contain iron, calcium impurities produce color. The petrified wood is generally not used for jewelry, but as furnishings accessories.
Petrified wood can be identified according to the hardness of the ring bands and the wood cell structure. Lapis lazuli called as "Infinity" and "point Dai" or "bi glass", is composed of a variety of minerals gemstones should be referred to as green gold rock from the principle of the geological point of view, but in the history of people have been termed lapis lazuli, the national standards is also the name of lapis lazuli. Lapis lazuli is a beautiful and rare multi-crystalline gems, produced in the United States, Afghanistan, Mongolia, Myanmar, Chile, Canada, Pakistan, India and Angola. China has not found lapis lazuli deposits. The world's most famous the lapis production to Afghanistan Bada Shiha mixed with trace amounts of pyrite. The cuff links are generally marked on the corresponding position on the map of the identification certificate of the diamond shape.
 Lapis lazuli has produced a uniform dark blue to sky blue, very fine-grained aphanitic structure, gleaming in the sunlight under brilliance. Lapis lazuli with its bright blue to win the love of the Oriental peoples of all countries. Favorite lapis lazuli began in the Western Han Dynasty, when the name is "blue red", "Kim Chi" point Dai. The diamond cufflinks without pondering even reach the level of gem are not very aesthetically pleasing.  Stone Ya says: "lapis lazuli hue, such as days, or complex gold dust is scattered, and the brilliant stars of Korea on the day." Days, so popular with the high regard of the emperor, the Qing Code map test contains: the emperor toward the bead miscellaneous ornaments, the only Temple of Heaven with lapis lazuli, to the altar with the amber, altar with coral, the altar with turquoise; emperor towards the band, decorated the Temple of Heaven with lapis lazuli, Ditan topaz, on the altar with coral month altar with white jade.
They "are by the jade-green to symbolize heaven, earth, day, month, where in days. In ancient times, been used for production of the emperor's burial, with its green color, let the dead easy to get in this manner in order to ascend to heaven the road. Sui Dynasty, regardless of the beads toward the band are mostly decorated with lapis lazuli, lapis lazuli is also listed four products of the official top. Only after carefully pondering and exquisitely designed, the diamonds can become a dazzling and flashing cufflinks. Very solemn dark blue lapis lazuli has, in addition to the production of jewelry place for the carving of Buddha, Dharma, bottles, furnace, animals, In addition, lapis lazuli or painting color and dyes. The famous Dunhuang Mogao Grottoes, Dunhuang West dry Buddha hole since Northern Dynasty to the Qing Dynasty murals, painted sculptures on the lapis lazuli as pigment.
 Lapis lazuli color of Tibetan Buddhism Medicine Buddha body color, often wearing to protect themselves healthy, disease-free without disaster. Lapis lazuli main mineral composition of lapis lazuli, It may also be calcite, pyrite, sodalite, diopside, mica, hornblende and other minerals. The crystal morphology of the rhombic dodecahedron, the aggregates showed a compact block, granular structure. Cut refers to the cutting and grinding levels of the diamond cufflinks.  The color is dark blue, violet blue, sky blue, green, blue, and so on. Containing more calcite was striped white, the yellow star on a blue ground containing pyrite, shiny glass to resin gloss, opaque to translucent, streak color is white to light blue, the refractive index of about 1.50 UV-hair green or white fluorescent calcite lapis lazuli and brown red fluorescence under UVA. No cleavage can be grainy, uneven fracture. Tiger eye stone: yellow to yellow or brown silicified asbestos, when refined into a convex-type gem, tour color, like the "eye of the tiger" and the name. Eagle-eye: blue, green, blue-gray silicified asbestos, when refined into a convex-type gem, because there are amusement color, color, and tour color like "Eagle Eye" and the name. Zebra tiger eye stone: brown yellow and blue and white banded wood alexandrite. There is international unified symbol of cufflinks to name the clarity of the diamonds.