At present, in the market there are a varity of kinds, can be summed up in only three categories: cultured pearl jewelry, natural pearls and beads imitation.
Cultured pearls and freshwater pearl beads are divided into freshwater cultured pearl and akoya cultured pearl. Freshwater Custody- Yieldis nuclear-free, is cultured in lakes, ponds and other water depth of no more than four meters in the artificial environment aquaculture; mariculture-produced in the tropical or subtropical in the shallow waters, both mining
With a nuclear culture; natural pearls are more granular round, the very small, usually naked eye is difficult to see.The exact difference between natural and cultured pearls and freshwater pearl jewelry has been identified as a difficult problem, but experts in accordance with the structure of pearls, pearl density, the fluorescence and transparency and other features, can be accurately distinguish between the two. For consumers, The identification method is simple: because of the very small natural pearls, the naked eye under a nuclear-free; sea culture-water nuclear, nuclear large freshwater aquaculture-nuclear-free. Artificial breeding transparency, and a transparent gelatinous appearance, while natural poor transparency, dignified appearance, artificial breeding-surface uplift and often pits, Natural-smooth appearance.
The most common imitation-there are three: Filling wax imitation glass beads: hollow in the radio milky white ball in a paraffin, the density of small-light weight, a hand that is ok.Can be differentiated, with the needle-detecting internal soft flu. Its smooth appearance, not carved with needle Dynamic; imitation solid glass beads: white solid glass ball soaked in the "Pearl of". From using needle Bodong from the drilling, its appearance will become Piandi shed, but not small scale-like powder, plastic beads coating imitation: the milky white plastic beads, a plating "
pearl fluid "and using needles provoke bored, the appearance will be falling into a film, not small scale-like powder, with the appearance of acupuncture to be feeling under the skin of non-glass materials. Usually
, Two pearls of mutual friction, sand the surface with flu, and imitation-between Moldova Shining, I feel very smooth, not sand influenza - which is to identify the authenticity of pearls one of the mostEasy way.
Pearl's many colors: white, gold, silver and powder, red, black, blue, gray.Such as color, with red and white rose slightly for the best, with black ribbons of metal.Special luster for good, but obviously to see the black, gray pearls, it should cause the caution, may be stained beads. Difference between staining, pearl color really means is: natural.Black Pearl is not pure black, but slightly rainbow-like flash of deep blue black, or with a bronze color of black pearls stained black and black, colors, monotonous,Luster worse, if the cloth dip slightly around 5 percent of dilute nitric acid scrub pearls, clothWould have a black track. Consumers in the purchase of precious black pearl, we should particularly pay much attention to it.