Material Application:
　　Quartz crystal is an important electronic material. Quartz chips cut in a certain direction, when subjected to mechanical stress will produce an electric field or charge proportional to the stress, this phenomenon is called the positive piezoelectric effect. On the contrary, when the quartz chip is subjected to an electric field, it will produce a strain proportional to the electric field, which is called the inverse piezoelectric effect. The positive and inverse effects are called piezoelectric effects. Quartz crystals not only have piezoelectric effect, but also have excellent mechanical, electrical and temperature characteristics. The resonators, oscillators and filters designed and manufactured by it have outstanding advantages in frequency stabilization and frequency selection.
　　Refractive index 1.533~1.541, birefringence difference 0.009, dispersion 0.013
　　Crystal system: hexagonal
　　Crystal: equiaxial, columnar, hexagonal bipyramidal shape
　　Aggregate type: massive, coarse granular, stalactite, tuberculous
　　Hardness: Mohs hardness is 7
　　Cleavage/fracture: conchoidal fracture
　　Gloss: Glass gloss
　　Color: None, white, with hints of gray, yellow to orange, purple, deep purple, pink, gray brown, brown, black
　　Streaks: White

Physical Optical Properties: