This product is glass and has professional dyeing and identification functions, which can helps users quickly and accurately identify jade, and gemstones This Chelseas color filter has a glass filter This gives better claritys, reduces distortion and provides better protections from humidity The sturdy and housing design effectively protects the color filter from damage Suitable for enthusiasts who appreciate and collect and jade, it can helps quickly and accurately determine the authenticitys and of gemstones The color filter adopts a foldable design, which is easy to carry and can be used for gemstones identification