1. Huang Yudong is bright yellow or golden yellow with mild metallic luster. Its crystal structure has obvious transparency and brightness, which is very suitable for jewelry and ornaments. Huang Yudong is also considered to have energy and spirituality, which can help regulate emotions and improve consciousness.

2. Amethyst Cave has the function of attracting wealth and ward off evil spirits, which can balance the energy of five elements, supplement "vitality" and strengthen kinetic energy. Put it behind the door or on the porch, it has the effect of eliminating evil spirits, exorcising evil spirits and gathering qi.

"Solemnly declare: the answer is for reference only, please don't be blindly superstitious".