Knowing the knowledge of jadeite knows that in recent years, with the progress of the times and people's pursuit of wealth, the artificial processing technology of jade has developed. A large number of jade B and C goods appeared on the market. So is the two worth collecting?
Different people have different opinions on how to correctly understand Jade B and C goods. Some people in the industry think that Jade B and C goods are also jadeites, which have certain collection value, so they can be sold on the market. However, some people have pointed out that jade B and C goods have been treated by twilight, bleaching, filling and dyeing. The surface structure and physical properties have changed accordingly, so they should not be sold as jade. These treated ores are not strictly jade, do not have the function of preservation and appreciation, so there is no collection value.
Professional Biconcave Lenses manufacturer is located in China, including Biconvex Lenses,Achromatic Lenses,Concave Lenses, etc.Founded in 2014, Bena was co-founded by several experienced engineers who have more than 10 years of optical design, process, production and test. We provide customization service for high precision (rms = 1/100λ, λ=632.8nm), large diameter plane mirror (>500mm) and aspherical lens, as well as professional spherical lens (such as Optical Domes with diameter 280mm), involving different materials including K9, Silicon, Sapphire, SiC, glass ceramics, fused silica, and other various optical glasses, and we can also deal with the nickel-phosphorus alloy surface on different substrates.
Biconcave Lenses,Biconvex Lenses,Achromatic Lenses,Concave Lenses
Changchun Bena Optical Products Co., Ltd , https://www.benaoptic.com