Amethyst, also known as wisdom crystal and geomantic stone. The main recruiting talents, promoting career and academic luck, and developing wisdom are deeply loved by the test party and the working party.
Amethys in English is composed of silicon dioxide (SiO2 _ 2) and belongs to ternary system, with hardness of 7, specific gravity of 2,65 and refractive index of 1, 54- 1, 55.